Home / 12,840.80-19,248.24-6,985.28

Finding the Fourth Proportional to 12,840.80, 19,248.24 and 6,985.28

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Solution

The fourth proportional to 12,840.80, 19,248.24 and 6,985.28 is: 10,470.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.80 : 19,248.24 = 6,985.28 : x
  2. Step 2: Convert to fraction form
    12,840.80/19,248.24 = 6,985.28/x
  3. Step 3: Cross multiply
    12,840.80x = 19,248.24 × 6,985.28
  4. Step 4: Simplify right side
    12,840.80x = 134,454,345.91
  5. Step 5: Solve for x
    x = 134,454,345.91/12,840.80
  6. Step 6: Final answer
    x = 10,470.87

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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.