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Finding the Fourth Proportional to 15,117, 20,861.64 and 8,403.12

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Solution

The fourth proportional to 15,117, 20,861.64 and 8,403.12 is: 11,596.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117 : 20,861.64 = 8,403.12 : x
  2. Step 2: Convert to fraction form
    15,117/20,861.64 = 8,403.12/x
  3. Step 3: Cross multiply
    15,117x = 20,861.64 × 8,403.12
  4. Step 4: Simplify right side
    15,117x = 175,302,864.32
  5. Step 5: Solve for x
    x = 175,302,864.32/15,117
  6. Step 6: Final answer
    x = 11,596.41

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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.