Home / 21,090.65-31,635.18-5,295.78

Finding the Fourth Proportional to 21,090.65, 31,635.18 and 5,295.78

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Solution

The fourth proportional to 21,090.65, 31,635.18 and 5,295.78 is: 7,943.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.65 : 31,635.18 = 5,295.78 : x
  2. Step 2: Convert to fraction form
    21,090.65/31,635.18 = 5,295.78/x
  3. Step 3: Cross multiply
    21,090.65x = 31,635.18 × 5,295.78
  4. Step 4: Simplify right side
    21,090.65x = 167,532,953.54
  5. Step 5: Solve for x
    x = 167,532,953.54/21,090.65
  6. Step 6: Final answer
    x = 7,943.47

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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.