Home / 28,434.08-39,238.56-15,688.49

Finding the Fourth Proportional to 28,434.08, 39,238.56 and 15,688.49

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Solution

The fourth proportional to 28,434.08, 39,238.56 and 15,688.49 is: 21,649.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.08 : 39,238.56 = 15,688.49 : x
  2. Step 2: Convert to fraction form
    28,434.08/39,238.56 = 15,688.49/x
  3. Step 3: Cross multiply
    28,434.08x = 39,238.56 × 15,688.49
  4. Step 4: Simplify right side
    28,434.08x = 615,593,559.98
  5. Step 5: Solve for x
    x = 615,593,559.98/28,434.08
  6. Step 6: Final answer
    x = 21,649.85

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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.