Home / 12,988.26-19,478.34-4,221.18

Finding the Fourth Proportional to 12,988.26, 19,478.34 and 4,221.18

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Solution

The fourth proportional to 12,988.26, 19,478.34 and 4,221.18 is: 6,330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.26 : 19,478.34 = 4,221.18 : x
  2. Step 2: Convert to fraction form
    12,988.26/19,478.34 = 4,221.18/x
  3. Step 3: Cross multiply
    12,988.26x = 19,478.34 × 4,221.18
  4. Step 4: Simplify right side
    12,988.26x = 82,221,579.24
  5. Step 5: Solve for x
    x = 82,221,579.24/12,988.26
  6. Step 6: Final answer
    x = 6,330.45

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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.