Home / 21,000.09-31,500.77-5,417.72

Finding the Fourth Proportional to 21,000.09, 31,500.77 and 5,417.72

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Solution

The fourth proportional to 21,000.09, 31,500.77 and 5,417.72 is: 8,126.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.09 : 31,500.77 = 5,417.72 : x
  2. Step 2: Convert to fraction form
    21,000.09/31,500.77 = 5,417.72/x
  3. Step 3: Cross multiply
    21,000.09x = 31,500.77 × 5,417.72
  4. Step 4: Simplify right side
    21,000.09x = 170,662,285.18
  5. Step 5: Solve for x
    x = 170,662,285.18/21,000.09
  6. Step 6: Final answer
    x = 8,126.74

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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.