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Finding the Fourth Proportional to 28,401.71, 42,602.31 and 12,602.93

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Solution

The fourth proportional to 28,401.71, 42,602.31 and 12,602.93 is: 18,904.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,401.71 : 42,602.31 = 12,602.93 : x
  2. Step 2: Convert to fraction form
    28,401.71/42,602.31 = 12,602.93/x
  3. Step 3: Cross multiply
    28,401.71x = 42,602.31 × 12,602.93
  4. Step 4: Simplify right side
    28,401.71x = 536,913,717.76
  5. Step 5: Solve for x
    x = 536,913,717.76/28,401.71
  6. Step 6: Final answer
    x = 18,904.28

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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.