Home / 15,878.56-21,887.16-12,515.92

Finding the Fourth Proportional to 15,878.56, 21,887.16 and 12,515.92

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Solution

The fourth proportional to 15,878.56, 21,887.16 and 12,515.92 is: 17,252.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878.56 : 21,887.16 = 12,515.92 : x
  2. Step 2: Convert to fraction form
    15,878.56/21,887.16 = 12,515.92/x
  3. Step 3: Cross multiply
    15,878.56x = 21,887.16 × 12,515.92
  4. Step 4: Simplify right side
    15,878.56x = 273,937,943.59
  5. Step 5: Solve for x
    x = 273,937,943.59/15,878.56
  6. Step 6: Final answer
    x = 17,252.06

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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.