Home / 28,118.60-38,808.69-21,393.98

Finding the Fourth Proportional to 28,118.60, 38,808.69 and 21,393.98

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Solution

The fourth proportional to 28,118.60, 38,808.69 and 21,393.98 is: 29,527.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,118.60 : 38,808.69 = 21,393.98 : x
  2. Step 2: Convert to fraction form
    28,118.60/38,808.69 = 21,393.98/x
  3. Step 3: Cross multiply
    28,118.60x = 38,808.69 × 21,393.98
  4. Step 4: Simplify right side
    28,118.60x = 830,272,337.69
  5. Step 5: Solve for x
    x = 830,272,337.69/28,118.60
  6. Step 6: Final answer
    x = 29,527.51

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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.