Home / 20,726.40-31,089.60-6,875.40

Finding the Fourth Proportional to 20,726.40, 31,089.60 and 6,875.40

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Solution

The fourth proportional to 20,726.40, 31,089.60 and 6,875.40 is: 10,313.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.40 : 31,089.60 = 6,875.40 : x
  2. Step 2: Convert to fraction form
    20,726.40/31,089.60 = 6,875.40/x
  3. Step 3: Cross multiply
    20,726.40x = 31,089.60 × 6,875.40
  4. Step 4: Simplify right side
    20,726.40x = 213,753,435.84
  5. Step 5: Solve for x
    x = 213,753,435.84/20,726.40
  6. Step 6: Final answer
    x = 10,313.10

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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.