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Finding the Fourth Proportional to 20,661.66, 28,512.50 and 11,710.01

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Solution

The fourth proportional to 20,661.66, 28,512.50 and 11,710.01 is: 16,159.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.66 : 28,512.50 = 11,710.01 : x
  2. Step 2: Convert to fraction form
    20,661.66/28,512.50 = 11,710.01/x
  3. Step 3: Cross multiply
    20,661.66x = 28,512.50 × 11,710.01
  4. Step 4: Simplify right side
    20,661.66x = 333,881,459.01
  5. Step 5: Solve for x
    x = 333,881,459.01/20,661.66
  6. Step 6: Final answer
    x = 16,159.47

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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.