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Finding the Fourth Proportional to 15,543.15, 21,448.74 and 8,827.89

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Solution

The fourth proportional to 15,543.15, 21,448.74 and 8,827.89 is: 12,182.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.15 : 21,448.74 = 8,827.89 : x
  2. Step 2: Convert to fraction form
    15,543.15/21,448.74 = 8,827.89/x
  3. Step 3: Cross multiply
    15,543.15x = 21,448.74 × 8,827.89
  4. Step 4: Simplify right side
    15,543.15x = 189,347,117.36
  5. Step 5: Solve for x
    x = 189,347,117.36/15,543.15
  6. Step 6: Final answer
    x = 12,182.03

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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.