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Finding the Fourth Proportional to 9,898.76, 13,644.02 and 7,905.80

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Solution

The fourth proportional to 9,898.76, 13,644.02 and 7,905.80 is: 10,897.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,898.76 : 13,644.02 = 7,905.80 : x
  2. Step 2: Convert to fraction form
    9,898.76/13,644.02 = 7,905.80/x
  3. Step 3: Cross multiply
    9,898.76x = 13,644.02 × 7,905.80
  4. Step 4: Simplify right side
    9,898.76x = 107,866,893.32
  5. Step 5: Solve for x
    x = 107,866,893.32/9,898.76
  6. Step 6: Final answer
    x = 10,897.01

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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.