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Finding the Fourth Proportional to 15,157.87, 20,916.59 and 8,445.08

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Solution

The fourth proportional to 15,157.87, 20,916.59 and 8,445.08 is: 11,653.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.87 : 20,916.59 = 8,445.08 : x
  2. Step 2: Convert to fraction form
    15,157.87/20,916.59 = 8,445.08/x
  3. Step 3: Cross multiply
    15,157.87x = 20,916.59 × 8,445.08
  4. Step 4: Simplify right side
    15,157.87x = 176,642,285.94
  5. Step 5: Solve for x
    x = 176,642,285.94/15,157.87
  6. Step 6: Final answer
    x = 11,653.51

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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.