Home / 21,328.63-31,979.25-8,857.26

Finding the Fourth Proportional to 21,328.63, 31,979.25 and 8,857.26

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Solution

The fourth proportional to 21,328.63, 31,979.25 and 8,857.26 is: 13,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.63 : 31,979.25 = 8,857.26 : x
  2. Step 2: Convert to fraction form
    21,328.63/31,979.25 = 8,857.26/x
  3. Step 3: Cross multiply
    21,328.63x = 31,979.25 × 8,857.26
  4. Step 4: Simplify right side
    21,328.63x = 283,248,531.86
  5. Step 5: Solve for x
    x = 283,248,531.86/21,328.63
  6. Step 6: Final answer
    x = 13,280.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.