Home / 21,419.76-29,560.40-13,459.04

Finding the Fourth Proportional to 21,419.76, 29,560.40 and 13,459.04

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Solution

The fourth proportional to 21,419.76, 29,560.40 and 13,459.04 is: 18,574.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.76 : 29,560.40 = 13,459.04 : x
  2. Step 2: Convert to fraction form
    21,419.76/29,560.40 = 13,459.04/x
  3. Step 3: Cross multiply
    21,419.76x = 29,560.40 × 13,459.04
  4. Step 4: Simplify right side
    21,419.76x = 397,854,606.02
  5. Step 5: Solve for x
    x = 397,854,606.02/21,419.76
  6. Step 6: Final answer
    x = 18,574.19

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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.