Home / 28,357.19-39,129.53-16,418.90

Finding the Fourth Proportional to 28,357.19, 39,129.53 and 16,418.90

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Solution

The fourth proportional to 28,357.19, 39,129.53 and 16,418.90 is: 22,656.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.19 : 39,129.53 = 16,418.90 : x
  2. Step 2: Convert to fraction form
    28,357.19/39,129.53 = 16,418.90/x
  3. Step 3: Cross multiply
    28,357.19x = 39,129.53 × 16,418.90
  4. Step 4: Simplify right side
    28,357.19x = 642,463,948.20
  5. Step 5: Solve for x
    x = 642,463,948.20/28,357.19
  6. Step 6: Final answer
    x = 22,656.12

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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.