Home / 10,938.80-16,386.60-6,543.20

Finding the Fourth Proportional to 10,938.80, 16,386.60 and 6,543.20

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Solution

The fourth proportional to 10,938.80, 16,386.60 and 6,543.20 is: 9,801.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,938.80 : 16,386.60 = 6,543.20 : x
  2. Step 2: Convert to fraction form
    10,938.80/16,386.60 = 6,543.20/x
  3. Step 3: Cross multiply
    10,938.80x = 16,386.60 × 6,543.20
  4. Step 4: Simplify right side
    10,938.80x = 107,220,801.12
  5. Step 5: Solve for x
    x = 107,220,801.12/10,938.80
  6. Step 6: Final answer
    x = 9,801.88

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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.