Home / 21,113.12-31,674.48-11,247.20

Finding the Fourth Proportional to 21,113.12, 31,674.48 and 11,247.20

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Solution

The fourth proportional to 21,113.12, 31,674.48 and 11,247.20 is: 16,873.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.12 : 31,674.48 = 11,247.20 : x
  2. Step 2: Convert to fraction form
    21,113.12/31,674.48 = 11,247.20/x
  3. Step 3: Cross multiply
    21,113.12x = 31,674.48 × 11,247.20
  4. Step 4: Simplify right side
    21,113.12x = 356,249,211.46
  5. Step 5: Solve for x
    x = 356,249,211.46/21,113.12
  6. Step 6: Final answer
    x = 16,873.36

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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.