Home / 15,284.68-21,102.06-9,988.36

Finding the Fourth Proportional to 15,284.68, 21,102.06 and 9,988.36

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Solution

The fourth proportional to 15,284.68, 21,102.06 and 9,988.36 is: 13,789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,284.68 : 21,102.06 = 9,988.36 : x
  2. Step 2: Convert to fraction form
    15,284.68/21,102.06 = 9,988.36/x
  3. Step 3: Cross multiply
    15,284.68x = 21,102.06 × 9,988.36
  4. Step 4: Simplify right side
    15,284.68x = 210,774,972.02
  5. Step 5: Solve for x
    x = 210,774,972.02/15,284.68
  6. Step 6: Final answer
    x = 13,789.95

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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.