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Finding the Fourth Proportional to 15,475, 21,358.20 and 9,187.24

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Solution

The fourth proportional to 15,475, 21,358.20 and 9,187.24 is: 12,679.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475 : 21,358.20 = 9,187.24 : x
  2. Step 2: Convert to fraction form
    15,475/21,358.20 = 9,187.24/x
  3. Step 3: Cross multiply
    15,475x = 21,358.20 × 9,187.24
  4. Step 4: Simplify right side
    15,475x = 196,222,909.37
  5. Step 5: Solve for x
    x = 196,222,909.37/15,475
  6. Step 6: Final answer
    x = 12,679.99

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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.