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Finding the Fourth Proportional to 22,515.88, 31,071.91 and 12,579.88

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Solution

The fourth proportional to 22,515.88, 31,071.91 and 12,579.88 is: 17,360.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,515.88 : 31,071.91 = 12,579.88 : x
  2. Step 2: Convert to fraction form
    22,515.88/31,071.91 = 12,579.88/x
  3. Step 3: Cross multiply
    22,515.88x = 31,071.91 × 12,579.88
  4. Step 4: Simplify right side
    22,515.88x = 390,880,899.17
  5. Step 5: Solve for x
    x = 390,880,899.17/22,515.88
  6. Step 6: Final answer
    x = 17,360.23

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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.