Home / 19,720.28-27,213.95-12,646.69

Finding the Fourth Proportional to 19,720.28, 27,213.95 and 12,646.69

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Solution

The fourth proportional to 19,720.28, 27,213.95 and 12,646.69 is: 17,452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.28 : 27,213.95 = 12,646.69 : x
  2. Step 2: Convert to fraction form
    19,720.28/27,213.95 = 12,646.69/x
  3. Step 3: Cross multiply
    19,720.28x = 27,213.95 × 12,646.69
  4. Step 4: Simplify right side
    19,720.28x = 344,166,352.91
  5. Step 5: Solve for x
    x = 344,166,352.91/19,720.28
  6. Step 6: Final answer
    x = 17,452.40

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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.