Home / 39,780.47-54,895.16-21,876.23

Finding the Fourth Proportional to 39,780.47, 54,895.16 and 21,876.23

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Solution

The fourth proportional to 39,780.47, 54,895.16 and 21,876.23 is: 30,188.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.47 : 54,895.16 = 21,876.23 : x
  2. Step 2: Convert to fraction form
    39,780.47/54,895.16 = 21,876.23/x
  3. Step 3: Cross multiply
    39,780.47x = 54,895.16 × 21,876.23
  4. Step 4: Simplify right side
    39,780.47x = 1,200,898,762.19
  5. Step 5: Solve for x
    x = 1,200,898,762.19/39,780.47
  6. Step 6: Final answer
    x = 30,188.15

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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.