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Finding the Fourth Proportional to 14,663.15, 21,978.21 and 7,272.91

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Solution

The fourth proportional to 14,663.15, 21,978.21 and 7,272.91 is: 10,901.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,663.15 : 21,978.21 = 7,272.91 : x
  2. Step 2: Convert to fraction form
    14,663.15/21,978.21 = 7,272.91/x
  3. Step 3: Cross multiply
    14,663.15x = 21,978.21 × 7,272.91
  4. Step 4: Simplify right side
    14,663.15x = 159,845,543.29
  5. Step 5: Solve for x
    x = 159,845,543.29/14,663.15
  6. Step 6: Final answer
    x = 10,901.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.