Home / 21,019.95-31,529.85-6,981.04

Finding the Fourth Proportional to 21,019.95, 31,529.85 and 6,981.04

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Solution

The fourth proportional to 21,019.95, 31,529.85 and 6,981.04 is: 10,471.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.95 : 31,529.85 = 6,981.04 : x
  2. Step 2: Convert to fraction form
    21,019.95/31,529.85 = 6,981.04/x
  3. Step 3: Cross multiply
    21,019.95x = 31,529.85 × 6,981.04
  4. Step 4: Simplify right side
    21,019.95x = 220,111,144.04
  5. Step 5: Solve for x
    x = 220,111,144.04/21,019.95
  6. Step 6: Final answer
    x = 10,471.54

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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.