Home / 20,771.34-31,131.09-10,386.06

Finding the Fourth Proportional to 20,771.34, 31,131.09 and 10,386.06

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Solution

The fourth proportional to 20,771.34, 31,131.09 and 10,386.06 is: 15,566.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.34 : 31,131.09 = 10,386.06 : x
  2. Step 2: Convert to fraction form
    20,771.34/31,131.09 = 10,386.06/x
  3. Step 3: Cross multiply
    20,771.34x = 31,131.09 × 10,386.06
  4. Step 4: Simplify right side
    20,771.34x = 323,329,368.61
  5. Step 5: Solve for x
    x = 323,329,368.61/20,771.34
  6. Step 6: Final answer
    x = 15,566.13

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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.