Home / 28,712.56-43,065.96-9,990.76

Finding the Fourth Proportional to 28,712.56, 43,065.96 and 9,990.76

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Solution

The fourth proportional to 28,712.56, 43,065.96 and 9,990.76 is: 14,985.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.56 : 43,065.96 = 9,990.76 : x
  2. Step 2: Convert to fraction form
    28,712.56/43,065.96 = 9,990.76/x
  3. Step 3: Cross multiply
    28,712.56x = 43,065.96 × 9,990.76
  4. Step 4: Simplify right side
    28,712.56x = 430,261,670.53
  5. Step 5: Solve for x
    x = 430,261,670.53/28,712.56
  6. Step 6: Final answer
    x = 14,985.14

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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.