Home / 21,152.60-29,201.90-13,503.56

Finding the Fourth Proportional to 21,152.60, 29,201.90 and 13,503.56

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Solution

The fourth proportional to 21,152.60, 29,201.90 and 13,503.56 is: 18,642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.60 : 29,201.90 = 13,503.56 : x
  2. Step 2: Convert to fraction form
    21,152.60/29,201.90 = 13,503.56/x
  3. Step 3: Cross multiply
    21,152.60x = 29,201.90 × 13,503.56
  4. Step 4: Simplify right side
    21,152.60x = 394,329,395.24
  5. Step 5: Solve for x
    x = 394,329,395.24/21,152.60
  6. Step 6: Final answer
    x = 18,642.13

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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.