Home / 28,461.71-39,279.32-15,717.32

Finding the Fourth Proportional to 28,461.71, 39,279.32 and 15,717.32

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Solution

The fourth proportional to 28,461.71, 39,279.32 and 15,717.32 is: 21,691.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,461.71 : 39,279.32 = 15,717.32 : x
  2. Step 2: Convert to fraction form
    28,461.71/39,279.32 = 15,717.32/x
  3. Step 3: Cross multiply
    28,461.71x = 39,279.32 × 15,717.32
  4. Step 4: Simplify right side
    28,461.71x = 617,365,563.24
  5. Step 5: Solve for x
    x = 617,365,563.24/28,461.71
  6. Step 6: Final answer
    x = 21,691.09

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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.