Home / 21,066.08-31,615.44-7,930.40

Finding the Fourth Proportional to 21,066.08, 31,615.44 and 7,930.40

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Solution

The fourth proportional to 21,066.08, 31,615.44 and 7,930.40 is: 11,901.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,066.08 : 31,615.44 = 7,930.40 : x
  2. Step 2: Convert to fraction form
    21,066.08/31,615.44 = 7,930.40/x
  3. Step 3: Cross multiply
    21,066.08x = 31,615.44 × 7,930.40
  4. Step 4: Simplify right side
    21,066.08x = 250,723,085.38
  5. Step 5: Solve for x
    x = 250,723,085.38/21,066.08
  6. Step 6: Final answer
    x = 11,901.74

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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.