Home / 20,657.10-28,506.18-11,225.68

Finding the Fourth Proportional to 20,657.10, 28,506.18 and 11,225.68

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Solution

The fourth proportional to 20,657.10, 28,506.18 and 11,225.68 is: 15,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.10 : 28,506.18 = 11,225.68 : x
  2. Step 2: Convert to fraction form
    20,657.10/28,506.18 = 11,225.68/x
  3. Step 3: Cross multiply
    20,657.10x = 28,506.18 × 11,225.68
  4. Step 4: Simplify right side
    20,657.10x = 320,001,254.70
  5. Step 5: Solve for x
    x = 320,001,254.70/20,657.10
  6. Step 6: Final answer
    x = 15,491.10

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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.