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Finding the Fourth Proportional to 19,931.99, 27,506.09 and 10,980.09

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Solution

The fourth proportional to 19,931.99, 27,506.09 and 10,980.09 is: 15,152.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.99 : 27,506.09 = 10,980.09 : x
  2. Step 2: Convert to fraction form
    19,931.99/27,506.09 = 10,980.09/x
  3. Step 3: Cross multiply
    19,931.99x = 27,506.09 × 10,980.09
  4. Step 4: Simplify right side
    19,931.99x = 302,019,371.20
  5. Step 5: Solve for x
    x = 302,019,371.20/19,931.99
  6. Step 6: Final answer
    x = 15,152.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.