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Finding the Fourth Proportional to 8,685.88, 11,985.99 and 5,100.32

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Solution

The fourth proportional to 8,685.88, 11,985.99 and 5,100.32 is: 7,038.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.88 : 11,985.99 = 5,100.32 : x
  2. Step 2: Convert to fraction form
    8,685.88/11,985.99 = 5,100.32/x
  3. Step 3: Cross multiply
    8,685.88x = 11,985.99 × 5,100.32
  4. Step 4: Simplify right side
    8,685.88x = 61,132,384.52
  5. Step 5: Solve for x
    x = 61,132,384.52/8,685.88
  6. Step 6: Final answer
    x = 7,038.13

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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.