Home / 42,685.52-64,031.70-11,520.32

Finding the Fourth Proportional to 42,685.52, 64,031.70 and 11,520.32

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Solution

The fourth proportional to 42,685.52, 64,031.70 and 11,520.32 is: 17,281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,685.52 : 64,031.70 = 11,520.32 : x
  2. Step 2: Convert to fraction form
    42,685.52/64,031.70 = 11,520.32/x
  3. Step 3: Cross multiply
    42,685.52x = 64,031.70 × 11,520.32
  4. Step 4: Simplify right side
    42,685.52x = 737,665,674.14
  5. Step 5: Solve for x
    x = 737,665,674.14/42,685.52
  6. Step 6: Final answer
    x = 17,281.40

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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.