Home / 21,459.47-29,612.12-11,899.31

Finding the Fourth Proportional to 21,459.47, 29,612.12 and 11,899.31

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Solution

The fourth proportional to 21,459.47, 29,612.12 and 11,899.31 is: 16,419.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.47 : 29,612.12 = 11,899.31 : x
  2. Step 2: Convert to fraction form
    21,459.47/29,612.12 = 11,899.31/x
  3. Step 3: Cross multiply
    21,459.47x = 29,612.12 × 11,899.31
  4. Step 4: Simplify right side
    21,459.47x = 352,363,588.08
  5. Step 5: Solve for x
    x = 352,363,588.08/21,459.47
  6. Step 6: Final answer
    x = 16,419.96

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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.