Home / 28,031-38,685.51-15,455.75

Finding the Fourth Proportional to 28,031, 38,685.51 and 15,455.75

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Solution

The fourth proportional to 28,031, 38,685.51 and 15,455.75 is: 21,330.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,031 : 38,685.51 = 15,455.75 : x
  2. Step 2: Convert to fraction form
    28,031/38,685.51 = 15,455.75/x
  3. Step 3: Cross multiply
    28,031x = 38,685.51 × 15,455.75
  4. Step 4: Simplify right side
    28,031x = 597,913,571.18
  5. Step 5: Solve for x
    x = 597,913,571.18/28,031
  6. Step 6: Final answer
    x = 21,330.44

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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.