Home / 21,750.57-30,019.95-12,318.93

Finding the Fourth Proportional to 21,750.57, 30,019.95 and 12,318.93

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Solution

The fourth proportional to 21,750.57, 30,019.95 and 12,318.93 is: 17,002.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.57 : 30,019.95 = 12,318.93 : x
  2. Step 2: Convert to fraction form
    21,750.57/30,019.95 = 12,318.93/x
  3. Step 3: Cross multiply
    21,750.57x = 30,019.95 × 12,318.93
  4. Step 4: Simplify right side
    21,750.57x = 369,813,662.65
  5. Step 5: Solve for x
    x = 369,813,662.65/21,750.57
  6. Step 6: Final answer
    x = 17,002.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.