Home / 20,495.85-28,285.65-15,451.17

Finding the Fourth Proportional to 20,495.85, 28,285.65 and 15,451.17

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Solution

The fourth proportional to 20,495.85, 28,285.65 and 15,451.17 is: 21,323.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.85 : 28,285.65 = 15,451.17 : x
  2. Step 2: Convert to fraction form
    20,495.85/28,285.65 = 15,451.17/x
  3. Step 3: Cross multiply
    20,495.85x = 28,285.65 × 15,451.17
  4. Step 4: Simplify right side
    20,495.85x = 437,046,386.71
  5. Step 5: Solve for x
    x = 437,046,386.71/20,495.85
  6. Step 6: Final answer
    x = 21,323.65

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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.