Home / 31,420.68-47,068.74-18,943.98

Finding the Fourth Proportional to 31,420.68, 47,068.74 and 18,943.98

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Solution

The fourth proportional to 31,420.68, 47,068.74 and 18,943.98 is: 28,378.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.68 : 47,068.74 = 18,943.98 : x
  2. Step 2: Convert to fraction form
    31,420.68/47,068.74 = 18,943.98/x
  3. Step 3: Cross multiply
    31,420.68x = 47,068.74 × 18,943.98
  4. Step 4: Simplify right side
    31,420.68x = 891,669,269.19
  5. Step 5: Solve for x
    x = 891,669,269.19/31,420.68
  6. Step 6: Final answer
    x = 28,378.42

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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.