Home / 21,265.04-31,868.40-13,459.92

Finding the Fourth Proportional to 21,265.04, 31,868.40 and 13,459.92

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Solution

The fourth proportional to 21,265.04, 31,868.40 and 13,459.92 is: 20,171.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.04 : 31,868.40 = 13,459.92 : x
  2. Step 2: Convert to fraction form
    21,265.04/31,868.40 = 13,459.92/x
  3. Step 3: Cross multiply
    21,265.04x = 31,868.40 × 13,459.92
  4. Step 4: Simplify right side
    21,265.04x = 428,946,114.53
  5. Step 5: Solve for x
    x = 428,946,114.53/21,265.04
  6. Step 6: Final answer
    x = 20,171.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.