Home / 13,239.71-18,270.93-7,271.50

Finding the Fourth Proportional to 13,239.71, 18,270.93 and 7,271.50

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Solution

The fourth proportional to 13,239.71, 18,270.93 and 7,271.50 is: 10,034.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.71 : 18,270.93 = 7,271.50 : x
  2. Step 2: Convert to fraction form
    13,239.71/18,270.93 = 7,271.50/x
  3. Step 3: Cross multiply
    13,239.71x = 18,270.93 × 7,271.50
  4. Step 4: Simplify right side
    13,239.71x = 132,857,031.14
  5. Step 5: Solve for x
    x = 132,857,031.14/13,239.71
  6. Step 6: Final answer
    x = 10,034.74

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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.