Home / 20,870.71-31,316.33-9,775.48

Finding the Fourth Proportional to 20,870.71, 31,316.33 and 9,775.48

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Solution

The fourth proportional to 20,870.71, 31,316.33 and 9,775.48 is: 14,668.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.71 : 31,316.33 = 9,775.48 : x
  2. Step 2: Convert to fraction form
    20,870.71/31,316.33 = 9,775.48/x
  3. Step 3: Cross multiply
    20,870.71x = 31,316.33 × 9,775.48
  4. Step 4: Simplify right side
    20,870.71x = 306,132,103.74
  5. Step 5: Solve for x
    x = 306,132,103.74/20,870.71
  6. Step 6: Final answer
    x = 14,668.03

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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.