Home / 15,705.48-21,673.74-8,631.91

Finding the Fourth Proportional to 15,705.48, 21,673.74 and 8,631.91

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Solution

The fourth proportional to 15,705.48, 21,673.74 and 8,631.91 is: 11,912.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,705.48 : 21,673.74 = 8,631.91 : x
  2. Step 2: Convert to fraction form
    15,705.48/21,673.74 = 8,631.91/x
  3. Step 3: Cross multiply
    15,705.48x = 21,673.74 × 8,631.91
  4. Step 4: Simplify right side
    15,705.48x = 187,085,773.04
  5. Step 5: Solve for x
    x = 187,085,773.04/15,705.48
  6. Step 6: Final answer
    x = 11,912.13

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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.