Home / 10,981.80-16,461.90-9,815.40

Finding the Fourth Proportional to 10,981.80, 16,461.90 and 9,815.40

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Solution

The fourth proportional to 10,981.80, 16,461.90 and 9,815.40 is: 14,713.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.80 : 16,461.90 = 9,815.40 : x
  2. Step 2: Convert to fraction form
    10,981.80/16,461.90 = 9,815.40/x
  3. Step 3: Cross multiply
    10,981.80x = 16,461.90 × 9,815.40
  4. Step 4: Simplify right side
    10,981.80x = 161,580,133.26
  5. Step 5: Solve for x
    x = 161,580,133.26/10,981.80
  6. Step 6: Final answer
    x = 14,713.45

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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.