Home / 13,035.52-19,579.40-7,780.80

Finding the Fourth Proportional to 13,035.52, 19,579.40 and 7,780.80

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Solution

The fourth proportional to 13,035.52, 19,579.40 and 7,780.80 is: 11,686.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,035.52 : 19,579.40 = 7,780.80 : x
  2. Step 2: Convert to fraction form
    13,035.52/19,579.40 = 7,780.80/x
  3. Step 3: Cross multiply
    13,035.52x = 19,579.40 × 7,780.80
  4. Step 4: Simplify right side
    13,035.52x = 152,343,395.52
  5. Step 5: Solve for x
    x = 152,343,395.52/13,035.52
  6. Step 6: Final answer
    x = 11,686.79

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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.