Home / 12,937.20-19,405.80-12,332.40

Finding the Fourth Proportional to 12,937.20, 19,405.80 and 12,332.40

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Solution

The fourth proportional to 12,937.20, 19,405.80 and 12,332.40 is: 18,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,937.20 : 19,405.80 = 12,332.40 : x
  2. Step 2: Convert to fraction form
    12,937.20/19,405.80 = 12,332.40/x
  3. Step 3: Cross multiply
    12,937.20x = 19,405.80 × 12,332.40
  4. Step 4: Simplify right side
    12,937.20x = 239,320,087.92
  5. Step 5: Solve for x
    x = 239,320,087.92/12,937.20
  6. Step 6: Final answer
    x = 18,498.60

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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.