Home / 21,002.51-31,503.56-9,903.08

Finding the Fourth Proportional to 21,002.51, 31,503.56 and 9,903.08

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Solution

The fourth proportional to 21,002.51, 31,503.56 and 9,903.08 is: 14,854.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.51 : 31,503.56 = 9,903.08 : x
  2. Step 2: Convert to fraction form
    21,002.51/31,503.56 = 9,903.08/x
  3. Step 3: Cross multiply
    21,002.51x = 31,503.56 × 9,903.08
  4. Step 4: Simplify right side
    21,002.51x = 311,982,067.93
  5. Step 5: Solve for x
    x = 311,982,067.93/21,002.51
  6. Step 6: Final answer
    x = 14,854.52

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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.