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Finding the Fourth Proportional to 11,364.40, 15,681.78 and 6,328.88

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Solution

The fourth proportional to 11,364.40, 15,681.78 and 6,328.88 is: 8,733.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,364.40 : 15,681.78 = 6,328.88 : x
  2. Step 2: Convert to fraction form
    11,364.40/15,681.78 = 6,328.88/x
  3. Step 3: Cross multiply
    11,364.40x = 15,681.78 × 6,328.88
  4. Step 4: Simplify right side
    11,364.40x = 99,248,103.81
  5. Step 5: Solve for x
    x = 99,248,103.81/11,364.40
  6. Step 6: Final answer
    x = 8,733.25

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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.