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Finding the Fourth Proportional to 15,124.82, 20,866.70 and 9,154.30

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Solution

The fourth proportional to 15,124.82, 20,866.70 and 9,154.30 is: 12,629.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,124.82 : 20,866.70 = 9,154.30 : x
  2. Step 2: Convert to fraction form
    15,124.82/20,866.70 = 9,154.30/x
  3. Step 3: Cross multiply
    15,124.82x = 20,866.70 × 9,154.30
  4. Step 4: Simplify right side
    15,124.82x = 191,020,031.81
  5. Step 5: Solve for x
    x = 191,020,031.81/15,124.82
  6. Step 6: Final answer
    x = 12,629.57

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.