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Finding the Fourth Proportional to 15,191.99, 20,964.95 and 8,386.01

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Solution

The fourth proportional to 15,191.99, 20,964.95 and 8,386.01 is: 11,572.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.99 : 20,964.95 = 8,386.01 : x
  2. Step 2: Convert to fraction form
    15,191.99/20,964.95 = 8,386.01/x
  3. Step 3: Cross multiply
    15,191.99x = 20,964.95 × 8,386.01
  4. Step 4: Simplify right side
    15,191.99x = 175,812,337.27
  5. Step 5: Solve for x
    x = 175,812,337.27/15,191.99
  6. Step 6: Final answer
    x = 11,572.70

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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.