Home / 28,359.36-39,134.40-16,421.76

Finding the Fourth Proportional to 28,359.36, 39,134.40 and 16,421.76

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Solution

The fourth proportional to 28,359.36, 39,134.40 and 16,421.76 is: 22,661.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.36 : 39,134.40 = 16,421.76 : x
  2. Step 2: Convert to fraction form
    28,359.36/39,134.40 = 16,421.76/x
  3. Step 3: Cross multiply
    28,359.36x = 39,134.40 × 16,421.76
  4. Step 4: Simplify right side
    28,359.36x = 642,655,724.54
  5. Step 5: Solve for x
    x = 642,655,724.54/28,359.36
  6. Step 6: Final answer
    x = 22,661.15

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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.