Home / 15,459.28-21,327.01-10,421.66

Finding the Fourth Proportional to 15,459.28, 21,327.01 and 10,421.66

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Solution

The fourth proportional to 15,459.28, 21,327.01 and 10,421.66 is: 14,377.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.28 : 21,327.01 = 10,421.66 : x
  2. Step 2: Convert to fraction form
    15,459.28/21,327.01 = 10,421.66/x
  3. Step 3: Cross multiply
    15,459.28x = 21,327.01 × 10,421.66
  4. Step 4: Simplify right side
    15,459.28x = 222,262,874.30
  5. Step 5: Solve for x
    x = 222,262,874.30/15,459.28
  6. Step 6: Final answer
    x = 14,377.31

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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.