Home / 15,931.19-21,983.26-9,215.82

Finding the Fourth Proportional to 15,931.19, 21,983.26 and 9,215.82

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Solution

The fourth proportional to 15,931.19, 21,983.26 and 9,215.82 is: 12,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.19 : 21,983.26 = 9,215.82 : x
  2. Step 2: Convert to fraction form
    15,931.19/21,983.26 = 9,215.82/x
  3. Step 3: Cross multiply
    15,931.19x = 21,983.26 × 9,215.82
  4. Step 4: Simplify right side
    15,931.19x = 202,593,767.17
  5. Step 5: Solve for x
    x = 202,593,767.17/15,931.19
  6. Step 6: Final answer
    x = 12,716.80

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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.