Home / 21,005.19-28,967.67-15,330.95

Finding the Fourth Proportional to 21,005.19, 28,967.67 and 15,330.95

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Solution

The fourth proportional to 21,005.19, 28,967.67 and 15,330.95 is: 21,142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.19 : 28,967.67 = 15,330.95 : x
  2. Step 2: Convert to fraction form
    21,005.19/28,967.67 = 15,330.95/x
  3. Step 3: Cross multiply
    21,005.19x = 28,967.67 × 15,330.95
  4. Step 4: Simplify right side
    21,005.19x = 444,101,864.18
  5. Step 5: Solve for x
    x = 444,101,864.18/21,005.19
  6. Step 6: Final answer
    x = 21,142.48

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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.