Home / 20,899.28-28,827.35-12,395.04

Finding the Fourth Proportional to 20,899.28, 28,827.35 and 12,395.04

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Solution

The fourth proportional to 20,899.28, 28,827.35 and 12,395.04 is: 17,097.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.28 : 28,827.35 = 12,395.04 : x
  2. Step 2: Convert to fraction form
    20,899.28/28,827.35 = 12,395.04/x
  3. Step 3: Cross multiply
    20,899.28x = 28,827.35 × 12,395.04
  4. Step 4: Simplify right side
    20,899.28x = 357,316,032.75
  5. Step 5: Solve for x
    x = 357,316,032.75/20,899.28
  6. Step 6: Final answer
    x = 17,097.05

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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.