Home / 21,869.92-30,177.78-12,308.64

Finding the Fourth Proportional to 21,869.92, 30,177.78 and 12,308.64

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Solution

The fourth proportional to 21,869.92, 30,177.78 and 12,308.64 is: 16,984.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.92 : 30,177.78 = 12,308.64 : x
  2. Step 2: Convert to fraction form
    21,869.92/30,177.78 = 12,308.64/x
  3. Step 3: Cross multiply
    21,869.92x = 30,177.78 × 12,308.64
  4. Step 4: Simplify right side
    21,869.92x = 371,447,430.02
  5. Step 5: Solve for x
    x = 371,447,430.02/21,869.92
  6. Step 6: Final answer
    x = 16,984.40

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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.