Home / 21,263.04-31,865.40-13,457.88

Finding the Fourth Proportional to 21,263.04, 31,865.40 and 13,457.88

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Solution

The fourth proportional to 21,263.04, 31,865.40 and 13,457.88 is: 20,168.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,263.04 : 31,865.40 = 13,457.88 : x
  2. Step 2: Convert to fraction form
    21,263.04/31,865.40 = 13,457.88/x
  3. Step 3: Cross multiply
    21,263.04x = 31,865.40 × 13,457.88
  4. Step 4: Simplify right side
    21,263.04x = 428,840,729.35
  5. Step 5: Solve for x
    x = 428,840,729.35/21,263.04
  6. Step 6: Final answer
    x = 20,168.36

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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.