Home / 12,528.10-17,290.62-7,221.88

Finding the Fourth Proportional to 12,528.10, 17,290.62 and 7,221.88

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Solution

The fourth proportional to 12,528.10, 17,290.62 and 7,221.88 is: 9,967.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528.10 : 17,290.62 = 7,221.88 : x
  2. Step 2: Convert to fraction form
    12,528.10/17,290.62 = 7,221.88/x
  3. Step 3: Cross multiply
    12,528.10x = 17,290.62 × 7,221.88
  4. Step 4: Simplify right side
    12,528.10x = 124,870,782.77
  5. Step 5: Solve for x
    x = 124,870,782.77/12,528.10
  6. Step 6: Final answer
    x = 9,967.26

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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.