Home / 15,790.08-21,770.10-12,947.16

Finding the Fourth Proportional to 15,790.08, 21,770.10 and 12,947.16

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Solution

The fourth proportional to 15,790.08, 21,770.10 and 12,947.16 is: 17,850.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.08 : 21,770.10 = 12,947.16 : x
  2. Step 2: Convert to fraction form
    15,790.08/21,770.10 = 12,947.16/x
  3. Step 3: Cross multiply
    15,790.08x = 21,770.10 × 12,947.16
  4. Step 4: Simplify right side
    15,790.08x = 281,860,967.92
  5. Step 5: Solve for x
    x = 281,860,967.92/15,790.08
  6. Step 6: Final answer
    x = 17,850.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.