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Finding the Fourth Proportional to 15,465.10, 21,342 and 8,750.80

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Solution

The fourth proportional to 15,465.10, 21,342 and 8,750.80 is: 12,076.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,465.10 : 21,342 = 8,750.80 : x
  2. Step 2: Convert to fraction form
    15,465.10/21,342 = 8,750.80/x
  3. Step 3: Cross multiply
    15,465.10x = 21,342 × 8,750.80
  4. Step 4: Simplify right side
    15,465.10x = 186,759,573.60
  5. Step 5: Solve for x
    x = 186,759,573.60/15,465.10
  6. Step 6: Final answer
    x = 12,076.20

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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.