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Finding the Fourth Proportional to 8,643.66, 12,928.23 and 7,564.74

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Solution

The fourth proportional to 8,643.66, 12,928.23 and 7,564.74 is: 11,314.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.66 : 12,928.23 = 7,564.74 : x
  2. Step 2: Convert to fraction form
    8,643.66/12,928.23 = 7,564.74/x
  3. Step 3: Cross multiply
    8,643.66x = 12,928.23 × 7,564.74
  4. Step 4: Simplify right side
    8,643.66x = 97,798,698.61
  5. Step 5: Solve for x
    x = 97,798,698.61/8,643.66
  6. Step 6: Final answer
    x = 11,314.50

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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.