Home / 15,128.57-22,590.87-12,360.71

Finding the Fourth Proportional to 15,128.57, 22,590.87 and 12,360.71

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Solution

The fourth proportional to 15,128.57, 22,590.87 and 12,360.71 is: 18,457.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.57 : 22,590.87 = 12,360.71 : x
  2. Step 2: Convert to fraction form
    15,128.57/22,590.87 = 12,360.71/x
  3. Step 3: Cross multiply
    15,128.57x = 22,590.87 × 12,360.71
  4. Step 4: Simplify right side
    15,128.57x = 279,239,130.91
  5. Step 5: Solve for x
    x = 279,239,130.91/15,128.57
  6. Step 6: Final answer
    x = 18,457.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.