Home / 28,368-39,147.86-15,795.20

Finding the Fourth Proportional to 28,368, 39,147.86 and 15,795.20

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Solution

The fourth proportional to 28,368, 39,147.86 and 15,795.20 is: 21,797.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,368 : 39,147.86 = 15,795.20 : x
  2. Step 2: Convert to fraction form
    28,368/39,147.86 = 15,795.20/x
  3. Step 3: Cross multiply
    28,368x = 39,147.86 × 15,795.20
  4. Step 4: Simplify right side
    28,368x = 618,348,278.27
  5. Step 5: Solve for x
    x = 618,348,278.27/28,368
  6. Step 6: Final answer
    x = 21,797.39

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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.