Home / 38,885.70-53,663.28-21,890.57

Finding the Fourth Proportional to 38,885.70, 53,663.28 and 21,890.57

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Solution

The fourth proportional to 38,885.70, 53,663.28 and 21,890.57 is: 30,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,885.70 : 53,663.28 = 21,890.57 : x
  2. Step 2: Convert to fraction form
    38,885.70/53,663.28 = 21,890.57/x
  3. Step 3: Cross multiply
    38,885.70x = 53,663.28 × 21,890.57
  4. Step 4: Simplify right side
    38,885.70x = 1,174,719,518.95
  5. Step 5: Solve for x
    x = 1,174,719,518.95/38,885.70
  6. Step 6: Final answer
    x = 30,209.55

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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.