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Finding the Fourth Proportional to 15,392.10, 23,088.87 and 7,991.88

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Solution

The fourth proportional to 15,392.10, 23,088.87 and 7,991.88 is: 11,988.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,392.10 : 23,088.87 = 7,991.88 : x
  2. Step 2: Convert to fraction form
    15,392.10/23,088.87 = 7,991.88/x
  3. Step 3: Cross multiply
    15,392.10x = 23,088.87 × 7,991.88
  4. Step 4: Simplify right side
    15,392.10x = 184,523,478.38
  5. Step 5: Solve for x
    x = 184,523,478.38/15,392.10
  6. Step 6: Final answer
    x = 11,988.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.