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Finding the Fourth Proportional to 32,913.20, 49,369.80 and 21,103.40

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Solution

The fourth proportional to 32,913.20, 49,369.80 and 21,103.40 is: 31,655.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,913.20 : 49,369.80 = 21,103.40 : x
  2. Step 2: Convert to fraction form
    32,913.20/49,369.80 = 21,103.40/x
  3. Step 3: Cross multiply
    32,913.20x = 49,369.80 × 21,103.40
  4. Step 4: Simplify right side
    32,913.20x = 1,041,870,637.32
  5. Step 5: Solve for x
    x = 1,041,870,637.32/32,913.20
  6. Step 6: Final answer
    x = 31,655.10

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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.