Home / 21,420.14-29,538.14-16,511.69

Finding the Fourth Proportional to 21,420.14, 29,538.14 and 16,511.69

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Solution

The fourth proportional to 21,420.14, 29,538.14 and 16,511.69 is: 22,769.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.14 : 29,538.14 = 16,511.69 : x
  2. Step 2: Convert to fraction form
    21,420.14/29,538.14 = 16,511.69/x
  3. Step 3: Cross multiply
    21,420.14x = 29,538.14 × 16,511.69
  4. Step 4: Simplify right side
    21,420.14x = 487,724,602.14
  5. Step 5: Solve for x
    x = 487,724,602.14/21,420.14
  6. Step 6: Final answer
    x = 22,769.45

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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.