Home / 21,038.47-31,553.39-7,890.55

Finding the Fourth Proportional to 21,038.47, 31,553.39 and 7,890.55

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Solution

The fourth proportional to 21,038.47, 31,553.39 and 7,890.55 is: 11,834.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.47 : 31,553.39 = 7,890.55 : x
  2. Step 2: Convert to fraction form
    21,038.47/31,553.39 = 7,890.55/x
  3. Step 3: Cross multiply
    21,038.47x = 31,553.39 × 7,890.55
  4. Step 4: Simplify right side
    21,038.47x = 248,973,562.01
  5. Step 5: Solve for x
    x = 248,973,562.01/21,038.47
  6. Step 6: Final answer
    x = 11,834.20

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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.