Home / 19,931.28-27,506.40-10,980.74

Finding the Fourth Proportional to 19,931.28, 27,506.40 and 10,980.74

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Solution

The fourth proportional to 19,931.28, 27,506.40 and 10,980.74 is: 15,154.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.28 : 27,506.40 = 10,980.74 : x
  2. Step 2: Convert to fraction form
    19,931.28/27,506.40 = 10,980.74/x
  3. Step 3: Cross multiply
    19,931.28x = 27,506.40 × 10,980.74
  4. Step 4: Simplify right side
    19,931.28x = 302,040,626.74
  5. Step 5: Solve for x
    x = 302,040,626.74/19,931.28
  6. Step 6: Final answer
    x = 15,154.10

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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.