Home / 21,031.37-31,542.60-7,884.71

Finding the Fourth Proportional to 21,031.37, 31,542.60 and 7,884.71

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Solution

The fourth proportional to 21,031.37, 31,542.60 and 7,884.71 is: 11,825.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.37 : 31,542.60 = 7,884.71 : x
  2. Step 2: Convert to fraction form
    21,031.37/31,542.60 = 7,884.71/x
  3. Step 3: Cross multiply
    21,031.37x = 31,542.60 × 7,884.71
  4. Step 4: Simplify right side
    21,031.37x = 248,704,332.50
  5. Step 5: Solve for x
    x = 248,704,332.50/21,031.37
  6. Step 6: Final answer
    x = 11,825.40

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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.