Home / 21,238.32-29,306.70-13,281.42

Finding the Fourth Proportional to 21,238.32, 29,306.70 and 13,281.42

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Solution

The fourth proportional to 21,238.32, 29,306.70 and 13,281.42 is: 18,327.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.32 : 29,306.70 = 13,281.42 : x
  2. Step 2: Convert to fraction form
    21,238.32/29,306.70 = 13,281.42/x
  3. Step 3: Cross multiply
    21,238.32x = 29,306.70 × 13,281.42
  4. Step 4: Simplify right side
    21,238.32x = 389,234,591.51
  5. Step 5: Solve for x
    x = 389,234,591.51/21,238.32
  6. Step 6: Final answer
    x = 18,327.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.