Home / 31,424.12-47,130.40-12,699.28

Finding the Fourth Proportional to 31,424.12, 47,130.40 and 12,699.28

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Solution

The fourth proportional to 31,424.12, 47,130.40 and 12,699.28 is: 19,046.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,424.12 : 47,130.40 = 12,699.28 : x
  2. Step 2: Convert to fraction form
    31,424.12/47,130.40 = 12,699.28/x
  3. Step 3: Cross multiply
    31,424.12x = 47,130.40 × 12,699.28
  4. Step 4: Simplify right side
    31,424.12x = 598,522,146.11
  5. Step 5: Solve for x
    x = 598,522,146.11/31,424.12
  6. Step 6: Final answer
    x = 19,046.58

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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.