Home / 18,931.97-28,402.41-5,785.40

Finding the Fourth Proportional to 18,931.97, 28,402.41 and 5,785.40

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Solution

The fourth proportional to 18,931.97, 28,402.41 and 5,785.40 is: 8,679.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.97 : 28,402.41 = 5,785.40 : x
  2. Step 2: Convert to fraction form
    18,931.97/28,402.41 = 5,785.40/x
  3. Step 3: Cross multiply
    18,931.97x = 28,402.41 × 5,785.40
  4. Step 4: Simplify right side
    18,931.97x = 164,319,302.81
  5. Step 5: Solve for x
    x = 164,319,302.81/18,931.97
  6. Step 6: Final answer
    x = 8,679.46

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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.