Home / 28,301.60-39,053.40-15,725.12

Finding the Fourth Proportional to 28,301.60, 39,053.40 and 15,725.12

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Solution

The fourth proportional to 28,301.60, 39,053.40 and 15,725.12 is: 21,699.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,301.60 : 39,053.40 = 15,725.12 : x
  2. Step 2: Convert to fraction form
    28,301.60/39,053.40 = 15,725.12/x
  3. Step 3: Cross multiply
    28,301.60x = 39,053.40 × 15,725.12
  4. Step 4: Simplify right side
    28,301.60x = 614,119,401.41
  5. Step 5: Solve for x
    x = 614,119,401.41/28,301.60
  6. Step 6: Final answer
    x = 21,699.11

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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.