Home / 10,987.60-16,459.80-7,488.40

Finding the Fourth Proportional to 10,987.60, 16,459.80 and 7,488.40

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Solution

The fourth proportional to 10,987.60, 16,459.80 and 7,488.40 is: 11,217.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.60 : 16,459.80 = 7,488.40 : x
  2. Step 2: Convert to fraction form
    10,987.60/16,459.80 = 7,488.40/x
  3. Step 3: Cross multiply
    10,987.60x = 16,459.80 × 7,488.40
  4. Step 4: Simplify right side
    10,987.60x = 123,257,566.32
  5. Step 5: Solve for x
    x = 123,257,566.32/10,987.60
  6. Step 6: Final answer
    x = 11,217.88

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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.