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Finding the Fourth Proportional to 18,461.70, 25,477.02 and 10,078.20

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Solution

The fourth proportional to 18,461.70, 25,477.02 and 10,078.20 is: 13,907.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.70 : 25,477.02 = 10,078.20 : x
  2. Step 2: Convert to fraction form
    18,461.70/25,477.02 = 10,078.20/x
  3. Step 3: Cross multiply
    18,461.70x = 25,477.02 × 10,078.20
  4. Step 4: Simplify right side
    18,461.70x = 256,762,502.96
  5. Step 5: Solve for x
    x = 256,762,502.96/18,461.70
  6. Step 6: Final answer
    x = 13,907.85

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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.