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Finding the Fourth Proportional to 8,987.94, 12,403.20 and 5,009.22

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Solution

The fourth proportional to 8,987.94, 12,403.20 and 5,009.22 is: 6,912.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.94 : 12,403.20 = 5,009.22 : x
  2. Step 2: Convert to fraction form
    8,987.94/12,403.20 = 5,009.22/x
  3. Step 3: Cross multiply
    8,987.94x = 12,403.20 × 5,009.22
  4. Step 4: Simplify right side
    8,987.94x = 62,130,357.50
  5. Step 5: Solve for x
    x = 62,130,357.50/8,987.94
  6. Step 6: Final answer
    x = 6,912.64

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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.