Home / 15,705.32-21,673.90-8,631.72

Finding the Fourth Proportional to 15,705.32, 21,673.90 and 8,631.72

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Solution

The fourth proportional to 15,705.32, 21,673.90 and 8,631.72 is: 11,912.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,705.32 : 21,673.90 = 8,631.72 : x
  2. Step 2: Convert to fraction form
    15,705.32/21,673.90 = 8,631.72/x
  3. Step 3: Cross multiply
    15,705.32x = 21,673.90 × 8,631.72
  4. Step 4: Simplify right side
    15,705.32x = 187,083,036.11
  5. Step 5: Solve for x
    x = 187,083,036.11/15,705.32
  6. Step 6: Final answer
    x = 11,912.08

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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.