Home / 20,810.58-31,200.66-7,663.20

Finding the Fourth Proportional to 20,810.58, 31,200.66 and 7,663.20

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Solution

The fourth proportional to 20,810.58, 31,200.66 and 7,663.20 is: 11,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.58 : 31,200.66 = 7,663.20 : x
  2. Step 2: Convert to fraction form
    20,810.58/31,200.66 = 7,663.20/x
  3. Step 3: Cross multiply
    20,810.58x = 31,200.66 × 7,663.20
  4. Step 4: Simplify right side
    20,810.58x = 239,096,897.71
  5. Step 5: Solve for x
    x = 239,096,897.71/20,810.58
  6. Step 6: Final answer
    x = 11,489.20

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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.