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Finding the Fourth Proportional to 28,141.21, 42,214.01 and 9,421.30

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Solution

The fourth proportional to 28,141.21, 42,214.01 and 9,421.30 is: 14,132.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,141.21 : 42,214.01 = 9,421.30 : x
  2. Step 2: Convert to fraction form
    28,141.21/42,214.01 = 9,421.30/x
  3. Step 3: Cross multiply
    28,141.21x = 42,214.01 × 9,421.30
  4. Step 4: Simplify right side
    28,141.21x = 397,710,852.41
  5. Step 5: Solve for x
    x = 397,710,852.41/28,141.21
  6. Step 6: Final answer
    x = 14,132.68

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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.