Home / 18,681.71-28,023.30-7,439.18

Finding the Fourth Proportional to 18,681.71, 28,023.30 and 7,439.18

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Solution

The fourth proportional to 18,681.71, 28,023.30 and 7,439.18 is: 11,159.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.71 : 28,023.30 = 7,439.18 : x
  2. Step 2: Convert to fraction form
    18,681.71/28,023.30 = 7,439.18/x
  3. Step 3: Cross multiply
    18,681.71x = 28,023.30 × 7,439.18
  4. Step 4: Simplify right side
    18,681.71x = 208,470,232.78
  5. Step 5: Solve for x
    x = 208,470,232.78/18,681.71
  6. Step 6: Final answer
    x = 11,159.06

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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.