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Finding the Fourth Proportional to 13,280.79, 19,923.79 and 4,395.76

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Solution

The fourth proportional to 13,280.79, 19,923.79 and 4,395.76 is: 6,594.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.79 : 19,923.79 = 4,395.76 : x
  2. Step 2: Convert to fraction form
    13,280.79/19,923.79 = 4,395.76/x
  3. Step 3: Cross multiply
    13,280.79x = 19,923.79 × 4,395.76
  4. Step 4: Simplify right side
    13,280.79x = 87,580,199.13
  5. Step 5: Solve for x
    x = 87,580,199.13/13,280.79
  6. Step 6: Final answer
    x = 6,594.50

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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.