Home / 21,318.18-31,981.05-6,526.77

Finding the Fourth Proportional to 21,318.18, 31,981.05 and 6,526.77

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Solution

The fourth proportional to 21,318.18, 31,981.05 and 6,526.77 is: 9,791.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.18 : 31,981.05 = 6,526.77 : x
  2. Step 2: Convert to fraction form
    21,318.18/31,981.05 = 6,526.77/x
  3. Step 3: Cross multiply
    21,318.18x = 31,981.05 × 6,526.77
  4. Step 4: Simplify right side
    21,318.18x = 208,732,957.71
  5. Step 5: Solve for x
    x = 208,732,957.71/21,318.18
  6. Step 6: Final answer
    x = 9,791.31

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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.