Home / 9,321.96-12,864.28-5,130.20

Finding the Fourth Proportional to 9,321.96, 12,864.28 and 5,130.20

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Solution

The fourth proportional to 9,321.96, 12,864.28 and 5,130.20 is: 7,079.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.96 : 12,864.28 = 5,130.20 : x
  2. Step 2: Convert to fraction form
    9,321.96/12,864.28 = 5,130.20/x
  3. Step 3: Cross multiply
    9,321.96x = 12,864.28 × 5,130.20
  4. Step 4: Simplify right side
    9,321.96x = 65,996,329.26
  5. Step 5: Solve for x
    x = 65,996,329.26/9,321.96
  6. Step 6: Final answer
    x = 7,079.66

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1.5x scale

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.