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Finding the Fourth Proportional to 12,357.40, 18,536.10 and 4,959.40

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Solution

The fourth proportional to 12,357.40, 18,536.10 and 4,959.40 is: 7,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,357.40 : 18,536.10 = 4,959.40 : x
  2. Step 2: Convert to fraction form
    12,357.40/18,536.10 = 4,959.40/x
  3. Step 3: Cross multiply
    12,357.40x = 18,536.10 × 4,959.40
  4. Step 4: Simplify right side
    12,357.40x = 91,927,934.34
  5. Step 5: Solve for x
    x = 91,927,934.34/12,357.40
  6. Step 6: Final answer
    x = 7,439.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.