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Finding the Fourth Proportional to 18,973.50, 28,461.46 and 7,881.09

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Solution

The fourth proportional to 18,973.50, 28,461.46 and 7,881.09 is: 11,822.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.50 : 28,461.46 = 7,881.09 : x
  2. Step 2: Convert to fraction form
    18,973.50/28,461.46 = 7,881.09/x
  3. Step 3: Cross multiply
    18,973.50x = 28,461.46 × 7,881.09
  4. Step 4: Simplify right side
    18,973.50x = 224,307,327.79
  5. Step 5: Solve for x
    x = 224,307,327.79/18,973.50
  6. Step 6: Final answer
    x = 11,822.14

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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.