Home / 21,130.53-31,711.75-14,451.06

Finding the Fourth Proportional to 21,130.53, 31,711.75 and 14,451.06

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Solution

The fourth proportional to 21,130.53, 31,711.75 and 14,451.06 is: 21,687.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.53 : 31,711.75 = 14,451.06 : x
  2. Step 2: Convert to fraction form
    21,130.53/31,711.75 = 14,451.06/x
  3. Step 3: Cross multiply
    21,130.53x = 31,711.75 × 14,451.06
  4. Step 4: Simplify right side
    21,130.53x = 458,268,401.96
  5. Step 5: Solve for x
    x = 458,268,401.96/21,130.53
  6. Step 6: Final answer
    x = 21,687.50

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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.