Home / 21,135.72-31,703.84-5,554.92

Finding the Fourth Proportional to 21,135.72, 31,703.84 and 5,554.92

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Solution

The fourth proportional to 21,135.72, 31,703.84 and 5,554.92 is: 8,332.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.72 : 31,703.84 = 5,554.92 : x
  2. Step 2: Convert to fraction form
    21,135.72/31,703.84 = 5,554.92/x
  3. Step 3: Cross multiply
    21,135.72x = 31,703.84 × 5,554.92
  4. Step 4: Simplify right side
    21,135.72x = 176,112,294.89
  5. Step 5: Solve for x
    x = 176,112,294.89/21,135.72
  6. Step 6: Final answer
    x = 8,332.45

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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.