Home / 20,948.07-31,430.81-8,476.91

Finding the Fourth Proportional to 20,948.07, 31,430.81 and 8,476.91

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Solution

The fourth proportional to 20,948.07, 31,430.81 and 8,476.91 is: 12,718.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.07 : 31,430.81 = 8,476.91 : x
  2. Step 2: Convert to fraction form
    20,948.07/31,430.81 = 8,476.91/x
  3. Step 3: Cross multiply
    20,948.07x = 31,430.81 × 8,476.91
  4. Step 4: Simplify right side
    20,948.07x = 266,435,948.06
  5. Step 5: Solve for x
    x = 266,435,948.06/20,948.07
  6. Step 6: Final answer
    x = 12,718.88

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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.