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Finding the Fourth Proportional to 15,606.79, 21,538.05 and 8,803.10

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Solution

The fourth proportional to 15,606.79, 21,538.05 and 8,803.10 is: 12,148.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,606.79 : 21,538.05 = 8,803.10 : x
  2. Step 2: Convert to fraction form
    15,606.79/21,538.05 = 8,803.10/x
  3. Step 3: Cross multiply
    15,606.79x = 21,538.05 × 8,803.10
  4. Step 4: Simplify right side
    15,606.79x = 189,601,557.15
  5. Step 5: Solve for x
    x = 189,601,557.15/15,606.79
  6. Step 6: Final answer
    x = 12,148.66

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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.