Home / 15,870.76-23,789.40-5,330.80

Finding the Fourth Proportional to 15,870.76, 23,789.40 and 5,330.80

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Solution

The fourth proportional to 15,870.76, 23,789.40 and 5,330.80 is: 7,990.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.76 : 23,789.40 = 5,330.80 : x
  2. Step 2: Convert to fraction form
    15,870.76/23,789.40 = 5,330.80/x
  3. Step 3: Cross multiply
    15,870.76x = 23,789.40 × 5,330.80
  4. Step 4: Simplify right side
    15,870.76x = 126,816,533.52
  5. Step 5: Solve for x
    x = 126,816,533.52/15,870.76
  6. Step 6: Final answer
    x = 7,990.58

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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.