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Finding the Fourth Proportional to 15,156.84, 20,916.48 and 8,442.48

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Solution

The fourth proportional to 15,156.84, 20,916.48 and 8,442.48 is: 11,650.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.84 : 20,916.48 = 8,442.48 : x
  2. Step 2: Convert to fraction form
    15,156.84/20,916.48 = 8,442.48/x
  3. Step 3: Cross multiply
    15,156.84x = 20,916.48 × 8,442.48
  4. Step 4: Simplify right side
    15,156.84x = 176,586,964.07
  5. Step 5: Solve for x
    x = 176,586,964.07/15,156.84
  6. Step 6: Final answer
    x = 11,650.65

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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.