Home / 15,137.12-20,889.96-8,764.40

Finding the Fourth Proportional to 15,137.12, 20,889.96 and 8,764.40

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Solution

The fourth proportional to 15,137.12, 20,889.96 and 8,764.40 is: 12,095.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,137.12 : 20,889.96 = 8,764.40 : x
  2. Step 2: Convert to fraction form
    15,137.12/20,889.96 = 8,764.40/x
  3. Step 3: Cross multiply
    15,137.12x = 20,889.96 × 8,764.40
  4. Step 4: Simplify right side
    15,137.12x = 183,087,965.42
  5. Step 5: Solve for x
    x = 183,087,965.42/15,137.12
  6. Step 6: Final answer
    x = 12,095.30

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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.