Home / 13,788.49-19,029.10-7,820.68

Finding the Fourth Proportional to 13,788.49, 19,029.10 and 7,820.68

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Solution

The fourth proportional to 13,788.49, 19,029.10 and 7,820.68 is: 10,793.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.49 : 19,029.10 = 7,820.68 : x
  2. Step 2: Convert to fraction form
    13,788.49/19,029.10 = 7,820.68/x
  3. Step 3: Cross multiply
    13,788.49x = 19,029.10 × 7,820.68
  4. Step 4: Simplify right side
    13,788.49x = 148,820,501.79
  5. Step 5: Solve for x
    x = 148,820,501.79/13,788.49
  6. Step 6: Final answer
    x = 10,793.10

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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.