Home / 20,678.78-31,030.92-9,583.40

Finding the Fourth Proportional to 20,678.78, 31,030.92 and 9,583.40

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Solution

The fourth proportional to 20,678.78, 31,030.92 and 9,583.40 is: 14,381.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.78 : 31,030.92 = 9,583.40 : x
  2. Step 2: Convert to fraction form
    20,678.78/31,030.92 = 9,583.40/x
  3. Step 3: Cross multiply
    20,678.78x = 31,030.92 × 9,583.40
  4. Step 4: Simplify right side
    20,678.78x = 297,381,563.57
  5. Step 5: Solve for x
    x = 297,381,563.57/20,678.78
  6. Step 6: Final answer
    x = 14,381.00

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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.