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Finding the Fourth Proportional to 40,386.99, 60,582.51 and 15,429.20

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Solution

The fourth proportional to 40,386.99, 60,582.51 and 15,429.20 is: 23,144.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,386.99 : 60,582.51 = 15,429.20 : x
  2. Step 2: Convert to fraction form
    40,386.99/60,582.51 = 15,429.20/x
  3. Step 3: Cross multiply
    40,386.99x = 60,582.51 × 15,429.20
  4. Step 4: Simplify right side
    40,386.99x = 934,739,360.38
  5. Step 5: Solve for x
    x = 934,739,360.38/40,386.99
  6. Step 6: Final answer
    x = 23,144.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.