Home / 13,730.28-18,946.59-7,988.79

Finding the Fourth Proportional to 13,730.28, 18,946.59 and 7,988.79

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Solution

The fourth proportional to 13,730.28, 18,946.59 and 7,988.79 is: 11,023.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.28 : 18,946.59 = 7,988.79 : x
  2. Step 2: Convert to fraction form
    13,730.28/18,946.59 = 7,988.79/x
  3. Step 3: Cross multiply
    13,730.28x = 18,946.59 × 7,988.79
  4. Step 4: Simplify right side
    13,730.28x = 151,360,328.73
  5. Step 5: Solve for x
    x = 151,360,328.73/13,730.28
  6. Step 6: Final answer
    x = 11,023.83

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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.