Home / 12,789-19,159.20-10,002.60

Finding the Fourth Proportional to 12,789, 19,159.20 and 10,002.60

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Solution

The fourth proportional to 12,789, 19,159.20 and 10,002.60 is: 14,984.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789 : 19,159.20 = 10,002.60 : x
  2. Step 2: Convert to fraction form
    12,789/19,159.20 = 10,002.60/x
  3. Step 3: Cross multiply
    12,789x = 19,159.20 × 10,002.60
  4. Step 4: Simplify right side
    12,789x = 191,641,813.92
  5. Step 5: Solve for x
    x = 191,641,813.92/12,789
  6. Step 6: Final answer
    x = 14,984.89

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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.