Home / 15,297.68-21,120-10,001.36

Finding the Fourth Proportional to 15,297.68, 21,120 and 10,001.36

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Solution

The fourth proportional to 15,297.68, 21,120 and 10,001.36 is: 13,807.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,297.68 : 21,120 = 10,001.36 : x
  2. Step 2: Convert to fraction form
    15,297.68/21,120 = 10,001.36/x
  3. Step 3: Cross multiply
    15,297.68x = 21,120 × 10,001.36
  4. Step 4: Simplify right side
    15,297.68x = 211,228,723.20
  5. Step 5: Solve for x
    x = 211,228,723.20/15,297.68
  6. Step 6: Final answer
    x = 13,807.89

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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.