Home / 26,643.20-39,964.80-21,718.40

Finding the Fourth Proportional to 26,643.20, 39,964.80 and 21,718.40

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Solution

The fourth proportional to 26,643.20, 39,964.80 and 21,718.40 is: 32,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,643.20 : 39,964.80 = 21,718.40 : x
  2. Step 2: Convert to fraction form
    26,643.20/39,964.80 = 21,718.40/x
  3. Step 3: Cross multiply
    26,643.20x = 39,964.80 × 21,718.40
  4. Step 4: Simplify right side
    26,643.20x = 867,971,512.32
  5. Step 5: Solve for x
    x = 867,971,512.32/26,643.20
  6. Step 6: Final answer
    x = 32,577.60

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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.