Home / 20,987.84-28,962.12-11,554.60

Finding the Fourth Proportional to 20,987.84, 28,962.12 and 11,554.60

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Solution

The fourth proportional to 20,987.84, 28,962.12 and 11,554.60 is: 15,944.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.84 : 28,962.12 = 11,554.60 : x
  2. Step 2: Convert to fraction form
    20,987.84/28,962.12 = 11,554.60/x
  3. Step 3: Cross multiply
    20,987.84x = 28,962.12 × 11,554.60
  4. Step 4: Simplify right side
    20,987.84x = 334,645,711.75
  5. Step 5: Solve for x
    x = 334,645,711.75/20,987.84
  6. Step 6: Final answer
    x = 15,944.74

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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.