Home / 8,490.24-12,721.92-6,547.20

Finding the Fourth Proportional to 8,490.24, 12,721.92 and 6,547.20

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Solution

The fourth proportional to 8,490.24, 12,721.92 and 6,547.20 is: 9,810.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.24 : 12,721.92 = 6,547.20 : x
  2. Step 2: Convert to fraction form
    8,490.24/12,721.92 = 6,547.20/x
  3. Step 3: Cross multiply
    8,490.24x = 12,721.92 × 6,547.20
  4. Step 4: Simplify right side
    8,490.24x = 83,292,954.62
  5. Step 5: Solve for x
    x = 83,292,954.62/8,490.24
  6. Step 6: Final answer
    x = 9,810.44

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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.