Home / 20,870.73-31,306.10-7,707.76

Finding the Fourth Proportional to 20,870.73, 31,306.10 and 7,707.76

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Solution

The fourth proportional to 20,870.73, 31,306.10 and 7,707.76 is: 11,561.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.73 : 31,306.10 = 7,707.76 : x
  2. Step 2: Convert to fraction form
    20,870.73/31,306.10 = 7,707.76/x
  3. Step 3: Cross multiply
    20,870.73x = 31,306.10 × 7,707.76
  4. Step 4: Simplify right side
    20,870.73x = 241,299,788.53
  5. Step 5: Solve for x
    x = 241,299,788.53/20,870.73
  6. Step 6: Final answer
    x = 11,561.64

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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.