Home / 21,155.61-31,752.45-11,303.31

Finding the Fourth Proportional to 21,155.61, 31,752.45 and 11,303.31

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Solution

The fourth proportional to 21,155.61, 31,752.45 and 11,303.31 is: 16,965.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.61 : 31,752.45 = 11,303.31 : x
  2. Step 2: Convert to fraction form
    21,155.61/31,752.45 = 11,303.31/x
  3. Step 3: Cross multiply
    21,155.61x = 31,752.45 × 11,303.31
  4. Step 4: Simplify right side
    21,155.61x = 358,907,785.61
  5. Step 5: Solve for x
    x = 358,907,785.61/21,155.61
  6. Step 6: Final answer
    x = 16,965.14

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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.