Home / 28,115.48-38,799.74-15,368.92

Finding the Fourth Proportional to 28,115.48, 38,799.74 and 15,368.92

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Solution

The fourth proportional to 28,115.48, 38,799.74 and 15,368.92 is: 21,209.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.48 : 38,799.74 = 15,368.92 : x
  2. Step 2: Convert to fraction form
    28,115.48/38,799.74 = 15,368.92/x
  3. Step 3: Cross multiply
    28,115.48x = 38,799.74 × 15,368.92
  4. Step 4: Simplify right side
    28,115.48x = 596,310,100.08
  5. Step 5: Solve for x
    x = 596,310,100.08/28,115.48
  6. Step 6: Final answer
    x = 21,209.32

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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.