Home / 20,471.07-30,688.35-7,988.19

Finding the Fourth Proportional to 20,471.07, 30,688.35 and 7,988.19

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Solution

The fourth proportional to 20,471.07, 30,688.35 and 7,988.19 is: 11,975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.07 : 30,688.35 = 7,988.19 : x
  2. Step 2: Convert to fraction form
    20,471.07/30,688.35 = 7,988.19/x
  3. Step 3: Cross multiply
    20,471.07x = 30,688.35 × 7,988.19
  4. Step 4: Simplify right side
    20,471.07x = 245,144,330.65
  5. Step 5: Solve for x
    x = 245,144,330.65/20,471.07
  6. Step 6: Final answer
    x = 11,975.16

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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.