Home / 18,720.16-28,060.80-7,622.08

Finding the Fourth Proportional to 18,720.16, 28,060.80 and 7,622.08

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Solution

The fourth proportional to 18,720.16, 28,060.80 and 7,622.08 is: 11,425.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.16 : 28,060.80 = 7,622.08 : x
  2. Step 2: Convert to fraction form
    18,720.16/28,060.80 = 7,622.08/x
  3. Step 3: Cross multiply
    18,720.16x = 28,060.80 × 7,622.08
  4. Step 4: Simplify right side
    18,720.16x = 213,881,662.46
  5. Step 5: Solve for x
    x = 213,881,662.46/18,720.16
  6. Step 6: Final answer
    x = 11,425.20

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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.