Home / 20,868.23-31,304.07-8,386.63

Finding the Fourth Proportional to 20,868.23, 31,304.07 and 8,386.63

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Solution

The fourth proportional to 20,868.23, 31,304.07 and 8,386.63 is: 12,580.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.23 : 31,304.07 = 8,386.63 : x
  2. Step 2: Convert to fraction form
    20,868.23/31,304.07 = 8,386.63/x
  3. Step 3: Cross multiply
    20,868.23x = 31,304.07 × 8,386.63
  4. Step 4: Simplify right side
    20,868.23x = 262,535,574.32
  5. Step 5: Solve for x
    x = 262,535,574.32/20,868.23
  6. Step 6: Final answer
    x = 12,580.63

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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.