Home / 28,431.89-42,632.74-8,705.15

Finding the Fourth Proportional to 28,431.89, 42,632.74 and 8,705.15

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Solution

The fourth proportional to 28,431.89, 42,632.74 and 8,705.15 is: 13,053.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.89 : 42,632.74 = 8,705.15 : x
  2. Step 2: Convert to fraction form
    28,431.89/42,632.74 = 8,705.15/x
  3. Step 3: Cross multiply
    28,431.89x = 42,632.74 × 8,705.15
  4. Step 4: Simplify right side
    28,431.89x = 371,124,396.61
  5. Step 5: Solve for x
    x = 371,124,396.61/28,431.89
  6. Step 6: Final answer
    x = 13,053.10

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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.