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Finding the Fourth Proportional to 15,154.13, 20,914.32 and 8,871.77

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Solution

The fourth proportional to 15,154.13, 20,914.32 and 8,871.77 is: 12,243.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.13 : 20,914.32 = 8,871.77 : x
  2. Step 2: Convert to fraction form
    15,154.13/20,914.32 = 8,871.77/x
  3. Step 3: Cross multiply
    15,154.13x = 20,914.32 × 8,871.77
  4. Step 4: Simplify right side
    15,154.13x = 185,547,036.75
  5. Step 5: Solve for x
    x = 185,547,036.75/15,154.13
  6. Step 6: Final answer
    x = 12,243.99

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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.