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Finding the Fourth Proportional to 12,479.35, 18,709.66 and 7,547.98

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Solution

The fourth proportional to 12,479.35, 18,709.66 and 7,547.98 is: 11,316.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.35 : 18,709.66 = 7,547.98 : x
  2. Step 2: Convert to fraction form
    12,479.35/18,709.66 = 7,547.98/x
  3. Step 3: Cross multiply
    12,479.35x = 18,709.66 × 7,547.98
  4. Step 4: Simplify right side
    12,479.35x = 141,220,139.49
  5. Step 5: Solve for x
    x = 141,220,139.49/12,479.35
  6. Step 6: Final answer
    x = 11,316.31

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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.