Home / 20,807.98-31,215.06-7,659.40

Finding the Fourth Proportional to 20,807.98, 31,215.06 and 7,659.40

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Solution

The fourth proportional to 20,807.98, 31,215.06 and 7,659.40 is: 11,490.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.98 : 31,215.06 = 7,659.40 : x
  2. Step 2: Convert to fraction form
    20,807.98/31,215.06 = 7,659.40/x
  3. Step 3: Cross multiply
    20,807.98x = 31,215.06 × 7,659.40
  4. Step 4: Simplify right side
    20,807.98x = 239,088,630.56
  5. Step 5: Solve for x
    x = 239,088,630.56/20,807.98
  6. Step 6: Final answer
    x = 11,490.24

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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.