Home / 28,557.60-42,836.72-11,920.16

Finding the Fourth Proportional to 28,557.60, 42,836.72 and 11,920.16

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Solution

The fourth proportional to 28,557.60, 42,836.72 and 11,920.16 is: 17,880.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.60 : 42,836.72 = 11,920.16 : x
  2. Step 2: Convert to fraction form
    28,557.60/42,836.72 = 11,920.16/x
  3. Step 3: Cross multiply
    28,557.60x = 42,836.72 × 11,920.16
  4. Step 4: Simplify right side
    28,557.60x = 510,620,556.28
  5. Step 5: Solve for x
    x = 510,620,556.28/28,557.60
  6. Step 6: Final answer
    x = 17,880.37

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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.