Home / 21,005.45-31,498.95-6,215.52

Finding the Fourth Proportional to 21,005.45, 31,498.95 and 6,215.52

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Solution

The fourth proportional to 21,005.45, 31,498.95 and 6,215.52 is: 9,320.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.45 : 31,498.95 = 6,215.52 : x
  2. Step 2: Convert to fraction form
    21,005.45/31,498.95 = 6,215.52/x
  3. Step 3: Cross multiply
    21,005.45x = 31,498.95 × 6,215.52
  4. Step 4: Simplify right side
    21,005.45x = 195,782,433.36
  5. Step 5: Solve for x
    x = 195,782,433.36/21,005.45
  6. Step 6: Final answer
    x = 9,320.55

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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.