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Finding the Fourth Proportional to 18,897.40, 26,078.65 and 10,400.50

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Solution

The fourth proportional to 18,897.40, 26,078.65 and 10,400.50 is: 14,352.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,897.40 : 26,078.65 = 10,400.50 : x
  2. Step 2: Convert to fraction form
    18,897.40/26,078.65 = 10,400.50/x
  3. Step 3: Cross multiply
    18,897.40x = 26,078.65 × 10,400.50
  4. Step 4: Simplify right side
    18,897.40x = 271,230,999.33
  5. Step 5: Solve for x
    x = 271,230,999.33/18,897.40
  6. Step 6: Final answer
    x = 14,352.82

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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.