Home / 21,461.08-32,119.62-20,643.16

Finding the Fourth Proportional to 21,461.08, 32,119.62 and 20,643.16

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Solution

The fourth proportional to 21,461.08, 32,119.62 and 20,643.16 is: 30,895.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,461.08 : 32,119.62 = 20,643.16 : x
  2. Step 2: Convert to fraction form
    21,461.08/32,119.62 = 20,643.16/x
  3. Step 3: Cross multiply
    21,461.08x = 32,119.62 × 20,643.16
  4. Step 4: Simplify right side
    21,461.08x = 663,050,454.80
  5. Step 5: Solve for x
    x = 663,050,454.80/21,461.08
  6. Step 6: Final answer
    x = 30,895.48

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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.