Home / 20,702.79-31,066.91-8,220.63

Finding the Fourth Proportional to 20,702.79, 31,066.91 and 8,220.63

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Solution

The fourth proportional to 20,702.79, 31,066.91 and 8,220.63 is: 12,336.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.79 : 31,066.91 = 8,220.63 : x
  2. Step 2: Convert to fraction form
    20,702.79/31,066.91 = 8,220.63/x
  3. Step 3: Cross multiply
    20,702.79x = 31,066.91 × 8,220.63
  4. Step 4: Simplify right side
    20,702.79x = 255,389,531.25
  5. Step 5: Solve for x
    x = 255,389,531.25/20,702.79
  6. Step 6: Final answer
    x = 12,336.00

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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.