Home / 21,155.86-31,752.83-11,303.56

Finding the Fourth Proportional to 21,155.86, 31,752.83 and 11,303.56

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Solution

The fourth proportional to 21,155.86, 31,752.83 and 11,303.56 is: 16,965.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.86 : 31,752.83 = 11,303.56 : x
  2. Step 2: Convert to fraction form
    21,155.86/31,752.83 = 11,303.56/x
  3. Step 3: Cross multiply
    21,155.86x = 31,752.83 × 11,303.56
  4. Step 4: Simplify right side
    21,155.86x = 358,919,962.56
  5. Step 5: Solve for x
    x = 358,919,962.56/21,155.86
  6. Step 6: Final answer
    x = 16,965.51

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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.