Home / 38,931.21-58,387.10-12,643.47

Finding the Fourth Proportional to 38,931.21, 58,387.10 and 12,643.47

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Solution

The fourth proportional to 38,931.21, 58,387.10 and 12,643.47 is: 18,962.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,931.21 : 58,387.10 = 12,643.47 : x
  2. Step 2: Convert to fraction form
    38,931.21/58,387.10 = 12,643.47/x
  3. Step 3: Cross multiply
    38,931.21x = 58,387.10 × 12,643.47
  4. Step 4: Simplify right side
    38,931.21x = 738,215,484.02
  5. Step 5: Solve for x
    x = 738,215,484.02/38,931.21
  6. Step 6: Final answer
    x = 18,962.05

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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.