Home / 21,011.94-28,997.55-11,580.48

Finding the Fourth Proportional to 21,011.94, 28,997.55 and 11,580.48

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Solution

The fourth proportional to 21,011.94, 28,997.55 and 11,580.48 is: 15,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.94 : 28,997.55 = 11,580.48 : x
  2. Step 2: Convert to fraction form
    21,011.94/28,997.55 = 11,580.48/x
  3. Step 3: Cross multiply
    21,011.94x = 28,997.55 × 11,580.48
  4. Step 4: Simplify right side
    21,011.94x = 335,805,547.82
  5. Step 5: Solve for x
    x = 335,805,547.82/21,011.94
  6. Step 6: Final answer
    x = 15,981.65

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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.