Home / 9,259.21-12,777.75-5,280.40

Finding the Fourth Proportional to 9,259.21, 12,777.75 and 5,280.40

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Solution

The fourth proportional to 9,259.21, 12,777.75 and 5,280.40 is: 7,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,259.21 : 12,777.75 = 5,280.40 : x
  2. Step 2: Convert to fraction form
    9,259.21/12,777.75 = 5,280.40/x
  3. Step 3: Cross multiply
    9,259.21x = 12,777.75 × 5,280.40
  4. Step 4: Simplify right side
    9,259.21x = 67,471,631.10
  5. Step 5: Solve for x
    x = 67,471,631.10/9,259.21
  6. Step 6: Final answer
    x = 7,286.97

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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.