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Finding the Fourth Proportional to 10,467.78, 15,700.05 and 9,889.44

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Solution

The fourth proportional to 10,467.78, 15,700.05 and 9,889.44 is: 14,832.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,467.78 : 15,700.05 = 9,889.44 : x
  2. Step 2: Convert to fraction form
    10,467.78/15,700.05 = 9,889.44/x
  3. Step 3: Cross multiply
    10,467.78x = 15,700.05 × 9,889.44
  4. Step 4: Simplify right side
    10,467.78x = 155,264,702.47
  5. Step 5: Solve for x
    x = 155,264,702.47/10,467.78
  6. Step 6: Final answer
    x = 14,832.63

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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.