Home / 13,510.40-18,644.65-7,541.78

Finding the Fourth Proportional to 13,510.40, 18,644.65 and 7,541.78

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Solution

The fourth proportional to 13,510.40, 18,644.65 and 7,541.78 is: 10,407.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,510.40 : 18,644.65 = 7,541.78 : x
  2. Step 2: Convert to fraction form
    13,510.40/18,644.65 = 7,541.78/x
  3. Step 3: Cross multiply
    13,510.40x = 18,644.65 × 7,541.78
  4. Step 4: Simplify right side
    13,510.40x = 140,613,736.40
  5. Step 5: Solve for x
    x = 140,613,736.40/13,510.40
  6. Step 6: Final answer
    x = 10,407.82

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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.