Home / 21,011.14-28,995.18-11,579.50

Finding the Fourth Proportional to 21,011.14, 28,995.18 and 11,579.50

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Solution

The fourth proportional to 21,011.14, 28,995.18 and 11,579.50 is: 15,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.14 : 28,995.18 = 11,579.50 : x
  2. Step 2: Convert to fraction form
    21,011.14/28,995.18 = 11,579.50/x
  3. Step 3: Cross multiply
    21,011.14x = 28,995.18 × 11,579.50
  4. Step 4: Simplify right side
    21,011.14x = 335,749,686.81
  5. Step 5: Solve for x
    x = 335,749,686.81/21,011.14
  6. Step 6: Final answer
    x = 15,979.60

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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.