Home / 28,172.16-38,903.91-18,118.05

Finding the Fourth Proportional to 28,172.16, 38,903.91 and 18,118.05

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Solution

The fourth proportional to 28,172.16, 38,903.91 and 18,118.05 is: 25,019.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.16 : 38,903.91 = 18,118.05 : x
  2. Step 2: Convert to fraction form
    28,172.16/38,903.91 = 18,118.05/x
  3. Step 3: Cross multiply
    28,172.16x = 38,903.91 × 18,118.05
  4. Step 4: Simplify right side
    28,172.16x = 704,862,986.58
  5. Step 5: Solve for x
    x = 704,862,986.58/28,172.16
  6. Step 6: Final answer
    x = 25,019.85

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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.