Home / 28,172.19-42,279.71-10,419.65

Finding the Fourth Proportional to 28,172.19, 42,279.71 and 10,419.65

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Solution

The fourth proportional to 28,172.19, 42,279.71 and 10,419.65 is: 15,637.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.19 : 42,279.71 = 10,419.65 : x
  2. Step 2: Convert to fraction form
    28,172.19/42,279.71 = 10,419.65/x
  3. Step 3: Cross multiply
    28,172.19x = 42,279.71 × 10,419.65
  4. Step 4: Simplify right side
    28,172.19x = 440,539,561.62
  5. Step 5: Solve for x
    x = 440,539,561.62/28,172.19
  6. Step 6: Final answer
    x = 15,637.39

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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.