Home / 21,109.52-31,664.28-14,515.76

Finding the Fourth Proportional to 21,109.52, 31,664.28 and 14,515.76

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Solution

The fourth proportional to 21,109.52, 31,664.28 and 14,515.76 is: 21,773.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.52 : 31,664.28 = 14,515.76 : x
  2. Step 2: Convert to fraction form
    21,109.52/31,664.28 = 14,515.76/x
  3. Step 3: Cross multiply
    21,109.52x = 31,664.28 × 14,515.76
  4. Step 4: Simplify right side
    21,109.52x = 459,631,089.05
  5. Step 5: Solve for x
    x = 459,631,089.05/21,109.52
  6. Step 6: Final answer
    x = 21,773.64

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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.