Home / 11,240.20-16,860.30-9,987.40

Finding the Fourth Proportional to 11,240.20, 16,860.30 and 9,987.40

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Solution

The fourth proportional to 11,240.20, 16,860.30 and 9,987.40 is: 14,981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,240.20 : 16,860.30 = 9,987.40 : x
  2. Step 2: Convert to fraction form
    11,240.20/16,860.30 = 9,987.40/x
  3. Step 3: Cross multiply
    11,240.20x = 16,860.30 × 9,987.40
  4. Step 4: Simplify right side
    11,240.20x = 168,390,560.22
  5. Step 5: Solve for x
    x = 168,390,560.22/11,240.20
  6. Step 6: Final answer
    x = 14,981.10

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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.