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Finding the Fourth Proportional to 48,000.78, 71,990.28 and 12,943.26

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Solution

The fourth proportional to 48,000.78, 71,990.28 and 12,943.26 is: 19,411.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,000.78 : 71,990.28 = 12,943.26 : x
  2. Step 2: Convert to fraction form
    48,000.78/71,990.28 = 12,943.26/x
  3. Step 3: Cross multiply
    48,000.78x = 71,990.28 × 12,943.26
  4. Step 4: Simplify right side
    48,000.78x = 931,788,911.51
  5. Step 5: Solve for x
    x = 931,788,911.51/48,000.78
  6. Step 6: Final answer
    x = 19,411.95

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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.