Home / 42,129.21-63,145.21-15,817.17

Finding the Fourth Proportional to 42,129.21, 63,145.21 and 15,817.17

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Solution

The fourth proportional to 42,129.21, 63,145.21 and 15,817.17 is: 23,707.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,129.21 : 63,145.21 = 15,817.17 : x
  2. Step 2: Convert to fraction form
    42,129.21/63,145.21 = 15,817.17/x
  3. Step 3: Cross multiply
    42,129.21x = 63,145.21 × 15,817.17
  4. Step 4: Simplify right side
    42,129.21x = 998,778,521.26
  5. Step 5: Solve for x
    x = 998,778,521.26/42,129.21
  6. Step 6: Final answer
    x = 23,707.51

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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.