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Finding the Fourth Proportional to 15,154.02, 20,911.95 and 8,439.39

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Solution

The fourth proportional to 15,154.02, 20,911.95 and 8,439.39 is: 11,646.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.02 : 20,911.95 = 8,439.39 : x
  2. Step 2: Convert to fraction form
    15,154.02/20,911.95 = 8,439.39/x
  3. Step 3: Cross multiply
    15,154.02x = 20,911.95 × 8,439.39
  4. Step 4: Simplify right side
    15,154.02x = 176,484,101.71
  5. Step 5: Solve for x
    x = 176,484,101.71/15,154.02
  6. Step 6: Final answer
    x = 11,646.03

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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.