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Finding the Fourth Proportional to 15,186.42, 20,959.08 and 8,898.79

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Solution

The fourth proportional to 15,186.42, 20,959.08 and 8,898.79 is: 12,281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,186.42 : 20,959.08 = 8,898.79 : x
  2. Step 2: Convert to fraction form
    15,186.42/20,959.08 = 8,898.79/x
  3. Step 3: Cross multiply
    15,186.42x = 20,959.08 × 8,898.79
  4. Step 4: Simplify right side
    15,186.42x = 186,510,451.51
  5. Step 5: Solve for x
    x = 186,510,451.51/15,186.42
  6. Step 6: Final answer
    x = 12,281.40

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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.