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Finding the Fourth Proportional to 8,702.49, 12,009.21 and 5,117.49

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Solution

The fourth proportional to 8,702.49, 12,009.21 and 5,117.49 is: 7,062.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,702.49 : 12,009.21 = 5,117.49 : x
  2. Step 2: Convert to fraction form
    8,702.49/12,009.21 = 5,117.49/x
  3. Step 3: Cross multiply
    8,702.49x = 12,009.21 × 5,117.49
  4. Step 4: Simplify right side
    8,702.49x = 61,457,012.08
  5. Step 5: Solve for x
    x = 61,457,012.08/8,702.49
  6. Step 6: Final answer
    x = 7,062.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.