Home / 21,130.62-31,700.92-6,899.02

Finding the Fourth Proportional to 21,130.62, 31,700.92 and 6,899.02

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Solution

The fourth proportional to 21,130.62, 31,700.92 and 6,899.02 is: 10,350.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.62 : 31,700.92 = 6,899.02 : x
  2. Step 2: Convert to fraction form
    21,130.62/31,700.92 = 6,899.02/x
  3. Step 3: Cross multiply
    21,130.62x = 31,700.92 × 6,899.02
  4. Step 4: Simplify right side
    21,130.62x = 218,705,281.10
  5. Step 5: Solve for x
    x = 218,705,281.10/21,130.62
  6. Step 6: Final answer
    x = 10,350.16

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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.