Home / 28,210.20-38,929.50-15,634.68

Finding the Fourth Proportional to 28,210.20, 38,929.50 and 15,634.68

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Solution

The fourth proportional to 28,210.20, 38,929.50 and 15,634.68 is: 21,575.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,210.20 : 38,929.50 = 15,634.68 : x
  2. Step 2: Convert to fraction form
    28,210.20/38,929.50 = 15,634.68/x
  3. Step 3: Cross multiply
    28,210.20x = 38,929.50 × 15,634.68
  4. Step 4: Simplify right side
    28,210.20x = 608,650,275.06
  5. Step 5: Solve for x
    x = 608,650,275.06/28,210.20
  6. Step 6: Final answer
    x = 21,575.54

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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.