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Finding the Fourth Proportional to 14,891.16, 20,550.16 and 8,430.28

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Solution

The fourth proportional to 14,891.16, 20,550.16 and 8,430.28 is: 11,633.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,891.16 : 20,550.16 = 8,430.28 : x
  2. Step 2: Convert to fraction form
    14,891.16/20,550.16 = 8,430.28/x
  3. Step 3: Cross multiply
    14,891.16x = 20,550.16 × 8,430.28
  4. Step 4: Simplify right side
    14,891.16x = 173,243,602.84
  5. Step 5: Solve for x
    x = 173,243,602.84/14,891.16
  6. Step 6: Final answer
    x = 11,633.99

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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.