Home / 21,349.81-31,981.87-19,605.90

Finding the Fourth Proportional to 21,349.81, 31,981.87 and 19,605.90

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Solution

The fourth proportional to 21,349.81, 31,981.87 and 19,605.90 is: 29,369.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,349.81 : 31,981.87 = 19,605.90 : x
  2. Step 2: Convert to fraction form
    21,349.81/31,981.87 = 19,605.90/x
  3. Step 3: Cross multiply
    21,349.81x = 31,981.87 × 19,605.90
  4. Step 4: Simplify right side
    21,349.81x = 627,033,247.00
  5. Step 5: Solve for x
    x = 627,033,247.00/21,349.81
  6. Step 6: Final answer
    x = 29,369.51

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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.