Home / 21,209.60-31,804.80-9,516.80

Finding the Fourth Proportional to 21,209.60, 31,804.80 and 9,516.80

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Solution

The fourth proportional to 21,209.60, 31,804.80 and 9,516.80 is: 14,270.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.60 : 31,804.80 = 9,516.80 : x
  2. Step 2: Convert to fraction form
    21,209.60/31,804.80 = 9,516.80/x
  3. Step 3: Cross multiply
    21,209.60x = 31,804.80 × 9,516.80
  4. Step 4: Simplify right side
    21,209.60x = 302,679,920.64
  5. Step 5: Solve for x
    x = 302,679,920.64/21,209.60
  6. Step 6: Final answer
    x = 14,270.89

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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.