Home / 28,291.18-42,358.74-18,918.22

Finding the Fourth Proportional to 28,291.18, 42,358.74 and 18,918.22

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Solution

The fourth proportional to 28,291.18, 42,358.74 and 18,918.22 is: 28,325.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.18 : 42,358.74 = 18,918.22 : x
  2. Step 2: Convert to fraction form
    28,291.18/42,358.74 = 18,918.22/x
  3. Step 3: Cross multiply
    28,291.18x = 42,358.74 × 18,918.22
  4. Step 4: Simplify right side
    28,291.18x = 801,351,962.24
  5. Step 5: Solve for x
    x = 801,351,962.24/28,291.18
  6. Step 6: Final answer
    x = 28,325.15

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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.