Home / 21,423.32-29,560.66-13,459.91

Finding the Fourth Proportional to 21,423.32, 29,560.66 and 13,459.91

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Solution

The fourth proportional to 21,423.32, 29,560.66 and 13,459.91 is: 18,572.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.32 : 29,560.66 = 13,459.91 : x
  2. Step 2: Convert to fraction form
    21,423.32/29,560.66 = 13,459.91/x
  3. Step 3: Cross multiply
    21,423.32x = 29,560.66 × 13,459.91
  4. Step 4: Simplify right side
    21,423.32x = 397,883,675.34
  5. Step 5: Solve for x
    x = 397,883,675.34/21,423.32
  6. Step 6: Final answer
    x = 18,572.46

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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.