Home / 21,079.92-29,085.70-12,578.16

Finding the Fourth Proportional to 21,079.92, 29,085.70 and 12,578.16

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Solution

The fourth proportional to 21,079.92, 29,085.70 and 12,578.16 is: 17,355.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.92 : 29,085.70 = 12,578.16 : x
  2. Step 2: Convert to fraction form
    21,079.92/29,085.70 = 12,578.16/x
  3. Step 3: Cross multiply
    21,079.92x = 29,085.70 × 12,578.16
  4. Step 4: Simplify right side
    21,079.92x = 365,844,588.31
  5. Step 5: Solve for x
    x = 365,844,588.31/21,079.92
  6. Step 6: Final answer
    x = 17,355.12

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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.