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Finding the Fourth Proportional to 18,681.84, 28,032.48 and 8,291.16

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Solution

The fourth proportional to 18,681.84, 28,032.48 and 8,291.16 is: 12,441.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.84 : 28,032.48 = 8,291.16 : x
  2. Step 2: Convert to fraction form
    18,681.84/28,032.48 = 8,291.16/x
  3. Step 3: Cross multiply
    18,681.84x = 28,032.48 × 8,291.16
  4. Step 4: Simplify right side
    18,681.84x = 232,421,776.88
  5. Step 5: Solve for x
    x = 232,421,776.88/18,681.84
  6. Step 6: Final answer
    x = 12,441.05

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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.