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Finding the Fourth Proportional to 12,013.60, 17,998.80 and 9,810.40

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Solution

The fourth proportional to 12,013.60, 17,998.80 and 9,810.40 is: 14,697.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,013.60 : 17,998.80 = 9,810.40 : x
  2. Step 2: Convert to fraction form
    12,013.60/17,998.80 = 9,810.40/x
  3. Step 3: Cross multiply
    12,013.60x = 17,998.80 × 9,810.40
  4. Step 4: Simplify right side
    12,013.60x = 176,575,427.52
  5. Step 5: Solve for x
    x = 176,575,427.52/12,013.60
  6. Step 6: Final answer
    x = 14,697.96

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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.