Home / 5,815.47-8,720.28-2,117.13

Finding the Fourth Proportional to 5,815.47, 8,720.28 and 2,117.13

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Solution

The fourth proportional to 5,815.47, 8,720.28 and 2,117.13 is: 3,174.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.47 : 8,720.28 = 2,117.13 : x
  2. Step 2: Convert to fraction form
    5,815.47/8,720.28 = 2,117.13/x
  3. Step 3: Cross multiply
    5,815.47x = 8,720.28 × 2,117.13
  4. Step 4: Simplify right side
    5,815.47x = 18,461,966.40
  5. Step 5: Solve for x
    x = 18,461,966.40/5,815.47
  6. Step 6: Final answer
    x = 3,174.63

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1.5x scale

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.