Home / 21,567.79-29,751.36-12,951.77

Finding the Fourth Proportional to 21,567.79, 29,751.36 and 12,951.77

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Solution

The fourth proportional to 21,567.79, 29,751.36 and 12,951.77 is: 17,866.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,567.79 : 29,751.36 = 12,951.77 : x
  2. Step 2: Convert to fraction form
    21,567.79/29,751.36 = 12,951.77/x
  3. Step 3: Cross multiply
    21,567.79x = 29,751.36 × 12,951.77
  4. Step 4: Simplify right side
    21,567.79x = 385,332,771.91
  5. Step 5: Solve for x
    x = 385,332,771.91/21,567.79
  6. Step 6: Final answer
    x = 17,866.12

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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.