Home / 20,330.40-28,056.30-11,376.84

Finding the Fourth Proportional to 20,330.40, 28,056.30 and 11,376.84

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Solution

The fourth proportional to 20,330.40, 28,056.30 and 11,376.84 is: 15,700.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.40 : 28,056.30 = 11,376.84 : x
  2. Step 2: Convert to fraction form
    20,330.40/28,056.30 = 11,376.84/x
  3. Step 3: Cross multiply
    20,330.40x = 28,056.30 × 11,376.84
  4. Step 4: Simplify right side
    20,330.40x = 319,192,036.09
  5. Step 5: Solve for x
    x = 319,192,036.09/20,330.40
  6. Step 6: Final answer
    x = 15,700.23

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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.