Home / 21,011.06-28,995.57-11,579.63

Finding the Fourth Proportional to 21,011.06, 28,995.57 and 11,579.63

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Solution

The fourth proportional to 21,011.06, 28,995.57 and 11,579.63 is: 15,980.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.06 : 28,995.57 = 11,579.63 : x
  2. Step 2: Convert to fraction form
    21,011.06/28,995.57 = 11,579.63/x
  3. Step 3: Cross multiply
    21,011.06x = 28,995.57 × 11,579.63
  4. Step 4: Simplify right side
    21,011.06x = 335,757,827.26
  5. Step 5: Solve for x
    x = 335,757,827.26/21,011.06
  6. Step 6: Final answer
    x = 15,980.05

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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.