Home / 28,123.78-38,810.40-15,377.01

Finding the Fourth Proportional to 28,123.78, 38,810.40 and 15,377.01

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Solution

The fourth proportional to 28,123.78, 38,810.40 and 15,377.01 is: 21,220.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,123.78 : 38,810.40 = 15,377.01 : x
  2. Step 2: Convert to fraction form
    28,123.78/38,810.40 = 15,377.01/x
  3. Step 3: Cross multiply
    28,123.78x = 38,810.40 × 15,377.01
  4. Step 4: Simplify right side
    28,123.78x = 596,787,908.90
  5. Step 5: Solve for x
    x = 596,787,908.90/28,123.78
  6. Step 6: Final answer
    x = 21,220.05

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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.