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Finding the Fourth Proportional to 8,706.83, 12,015.54 and 5,124.20

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Solution

The fourth proportional to 8,706.83, 12,015.54 and 5,124.20 is: 7,071.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.83 : 12,015.54 = 5,124.20 : x
  2. Step 2: Convert to fraction form
    8,706.83/12,015.54 = 5,124.20/x
  3. Step 3: Cross multiply
    8,706.83x = 12,015.54 × 5,124.20
  4. Step 4: Simplify right side
    8,706.83x = 61,569,969.99
  5. Step 5: Solve for x
    x = 61,569,969.99/8,706.83
  6. Step 6: Final answer
    x = 7,071.46

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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.