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Finding the Fourth Proportional to 12,678.48, 19,010.88 and 8,987.94

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Solution

The fourth proportional to 12,678.48, 19,010.88 and 8,987.94 is: 13,477.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.48 : 19,010.88 = 8,987.94 : x
  2. Step 2: Convert to fraction form
    12,678.48/19,010.88 = 8,987.94/x
  3. Step 3: Cross multiply
    12,678.48x = 19,010.88 × 8,987.94
  4. Step 4: Simplify right side
    12,678.48x = 170,868,648.79
  5. Step 5: Solve for x
    x = 170,868,648.79/12,678.48
  6. Step 6: Final answer
    x = 13,477.06

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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.