Home / 15,275.68-21,078.48-8,985.76

Finding the Fourth Proportional to 15,275.68, 21,078.48 and 8,985.76

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Solution

The fourth proportional to 15,275.68, 21,078.48 and 8,985.76 is: 12,399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,275.68 : 21,078.48 = 8,985.76 : x
  2. Step 2: Convert to fraction form
    15,275.68/21,078.48 = 8,985.76/x
  3. Step 3: Cross multiply
    15,275.68x = 21,078.48 × 8,985.76
  4. Step 4: Simplify right side
    15,275.68x = 189,406,162.44
  5. Step 5: Solve for x
    x = 189,406,162.44/15,275.68
  6. Step 6: Final answer
    x = 12,399.20

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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.