Home / 21,010.30-28,954.31-15,031.60

Finding the Fourth Proportional to 21,010.30, 28,954.31 and 15,031.60

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Solution

The fourth proportional to 21,010.30, 28,954.31 and 15,031.60 is: 20,715.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.30 : 28,954.31 = 15,031.60 : x
  2. Step 2: Convert to fraction form
    21,010.30/28,954.31 = 15,031.60/x
  3. Step 3: Cross multiply
    21,010.30x = 28,954.31 × 15,031.60
  4. Step 4: Simplify right side
    21,010.30x = 435,229,458.65
  5. Step 5: Solve for x
    x = 435,229,458.65/21,010.30
  6. Step 6: Final answer
    x = 20,715.05

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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.