Home / 13,158.88-19,569.08-12,743.59

Finding the Fourth Proportional to 13,158.88, 19,569.08 and 12,743.59

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Solution

The fourth proportional to 13,158.88, 19,569.08 and 12,743.59 is: 18,951.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.88 : 19,569.08 = 12,743.59 : x
  2. Step 2: Convert to fraction form
    13,158.88/19,569.08 = 12,743.59/x
  3. Step 3: Cross multiply
    13,158.88x = 19,569.08 × 12,743.59
  4. Step 4: Simplify right side
    13,158.88x = 249,380,332.20
  5. Step 5: Solve for x
    x = 249,380,332.20/13,158.88
  6. Step 6: Final answer
    x = 18,951.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.