Home / 20,281.02-27,987.12-11,328.45

Finding the Fourth Proportional to 20,281.02, 27,987.12 and 11,328.45

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Solution

The fourth proportional to 20,281.02, 27,987.12 and 11,328.45 is: 15,632.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.02 : 27,987.12 = 11,328.45 : x
  2. Step 2: Convert to fraction form
    20,281.02/27,987.12 = 11,328.45/x
  3. Step 3: Cross multiply
    20,281.02x = 27,987.12 × 11,328.45
  4. Step 4: Simplify right side
    20,281.02x = 317,050,689.56
  5. Step 5: Solve for x
    x = 317,050,689.56/20,281.02
  6. Step 6: Final answer
    x = 15,632.88

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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.