Home / 28,123.70-38,810.75-15,376.68

Finding the Fourth Proportional to 28,123.70, 38,810.75 and 15,376.68

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Solution

The fourth proportional to 28,123.70, 38,810.75 and 15,376.68 is: 21,219.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,123.70 : 38,810.75 = 15,376.68 : x
  2. Step 2: Convert to fraction form
    28,123.70/38,810.75 = 15,376.68/x
  3. Step 3: Cross multiply
    28,123.70x = 38,810.75 × 15,376.68
  4. Step 4: Simplify right side
    28,123.70x = 596,780,406.43
  5. Step 5: Solve for x
    x = 596,780,406.43/28,123.70
  6. Step 6: Final answer
    x = 21,219.84

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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.