Home / 28,218.15-42,336.05-16,985.79

Finding the Fourth Proportional to 28,218.15, 42,336.05 and 16,985.79

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Solution

The fourth proportional to 28,218.15, 42,336.05 and 16,985.79 is: 25,483.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.15 : 42,336.05 = 16,985.79 : x
  2. Step 2: Convert to fraction form
    28,218.15/42,336.05 = 16,985.79/x
  3. Step 3: Cross multiply
    28,218.15x = 42,336.05 × 16,985.79
  4. Step 4: Simplify right side
    28,218.15x = 719,111,169.80
  5. Step 5: Solve for x
    x = 719,111,169.80/28,218.15
  6. Step 6: Final answer
    x = 25,483.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.