Home / 21,134.88-31,690.45-14,478.90

Finding the Fourth Proportional to 21,134.88, 31,690.45 and 14,478.90

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Solution

The fourth proportional to 21,134.88, 31,690.45 and 14,478.90 is: 21,710.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,134.88 : 31,690.45 = 14,478.90 : x
  2. Step 2: Convert to fraction form
    21,134.88/31,690.45 = 14,478.90/x
  3. Step 3: Cross multiply
    21,134.88x = 31,690.45 × 14,478.90
  4. Step 4: Simplify right side
    21,134.88x = 458,842,856.51
  5. Step 5: Solve for x
    x = 458,842,856.51/21,134.88
  6. Step 6: Final answer
    x = 21,710.22

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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.