Home / 39,211.08-54,111.51-21,306.23

Finding the Fourth Proportional to 39,211.08, 54,111.51 and 21,306.23

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Solution

The fourth proportional to 39,211.08, 54,111.51 and 21,306.23 is: 29,402.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,211.08 : 54,111.51 = 21,306.23 : x
  2. Step 2: Convert to fraction form
    39,211.08/54,111.51 = 21,306.23/x
  3. Step 3: Cross multiply
    39,211.08x = 54,111.51 × 21,306.23
  4. Step 4: Simplify right side
    39,211.08x = 1,152,912,277.71
  5. Step 5: Solve for x
    x = 1,152,912,277.71/39,211.08
  6. Step 6: Final answer
    x = 29,402.72

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Half scale
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Double scale
Find fourth proportional to 39,212.08, 54,112.89 and 21,307.23
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.