Home / 15,420.98-21,259.78-9,752.90

Finding the Fourth Proportional to 15,420.98, 21,259.78 and 9,752.90

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Solution

The fourth proportional to 15,420.98, 21,259.78 and 9,752.90 is: 13,445.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.98 : 21,259.78 = 9,752.90 : x
  2. Step 2: Convert to fraction form
    15,420.98/21,259.78 = 9,752.90/x
  3. Step 3: Cross multiply
    15,420.98x = 21,259.78 × 9,752.90
  4. Step 4: Simplify right side
    15,420.98x = 207,344,508.36
  5. Step 5: Solve for x
    x = 207,344,508.36/15,420.98
  6. Step 6: Final answer
    x = 13,445.61

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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.