Home / 20,899.08-28,812.25-14,920.35

Finding the Fourth Proportional to 20,899.08, 28,812.25 and 14,920.35

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Solution

The fourth proportional to 20,899.08, 28,812.25 and 14,920.35 is: 20,569.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.08 : 28,812.25 = 14,920.35 : x
  2. Step 2: Convert to fraction form
    20,899.08/28,812.25 = 14,920.35/x
  3. Step 3: Cross multiply
    20,899.08x = 28,812.25 × 14,920.35
  4. Step 4: Simplify right side
    20,899.08x = 429,888,854.29
  5. Step 5: Solve for x
    x = 429,888,854.29/20,899.08
  6. Step 6: Final answer
    x = 20,569.75

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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.