Home / 20,280.68-27,988.74-11,329.47

Finding the Fourth Proportional to 20,280.68, 27,988.74 and 11,329.47

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Solution

The fourth proportional to 20,280.68, 27,988.74 and 11,329.47 is: 15,635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.68 : 27,988.74 = 11,329.47 : x
  2. Step 2: Convert to fraction form
    20,280.68/27,988.74 = 11,329.47/x
  3. Step 3: Cross multiply
    20,280.68x = 27,988.74 × 11,329.47
  4. Step 4: Simplify right side
    20,280.68x = 317,097,590.17
  5. Step 5: Solve for x
    x = 317,097,590.17/20,280.68
  6. Step 6: Final answer
    x = 15,635.45

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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.