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Finding the Fourth Proportional to 15,156.29, 20,916.06 and 8,442.03

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Solution

The fourth proportional to 15,156.29, 20,916.06 and 8,442.03 is: 11,650.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.29 : 20,916.06 = 8,442.03 : x
  2. Step 2: Convert to fraction form
    15,156.29/20,916.06 = 8,442.03/x
  3. Step 3: Cross multiply
    15,156.29x = 20,916.06 × 8,442.03
  4. Step 4: Simplify right side
    15,156.29x = 176,574,017.70
  5. Step 5: Solve for x
    x = 176,574,017.70/15,156.29
  6. Step 6: Final answer
    x = 11,650.21

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1.5x scale

Why These Related Problems?

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