Home / 21,005.94-28,988.16-11,574.50

Finding the Fourth Proportional to 21,005.94, 28,988.16 and 11,574.50

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Solution

The fourth proportional to 21,005.94, 28,988.16 and 11,574.50 is: 15,972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.94 : 28,988.16 = 11,574.50 : x
  2. Step 2: Convert to fraction form
    21,005.94/28,988.16 = 11,574.50/x
  3. Step 3: Cross multiply
    21,005.94x = 28,988.16 × 11,574.50
  4. Step 4: Simplify right side
    21,005.94x = 335,523,457.92
  5. Step 5: Solve for x
    x = 335,523,457.92/21,005.94
  6. Step 6: Final answer
    x = 15,972.79

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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.