Home / 21,431.16-32,129.28-8,960.40

Finding the Fourth Proportional to 21,431.16, 32,129.28 and 8,960.40

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Solution

The fourth proportional to 21,431.16, 32,129.28 and 8,960.40 is: 13,433.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.16 : 32,129.28 = 8,960.40 : x
  2. Step 2: Convert to fraction form
    21,431.16/32,129.28 = 8,960.40/x
  3. Step 3: Cross multiply
    21,431.16x = 32,129.28 × 8,960.40
  4. Step 4: Simplify right side
    21,431.16x = 287,891,200.51
  5. Step 5: Solve for x
    x = 287,891,200.51/21,431.16
  6. Step 6: Final answer
    x = 13,433.30

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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.