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Finding the Fourth Proportional to 15,640.64, 21,582.96 and 8,565.92

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Solution

The fourth proportional to 15,640.64, 21,582.96 and 8,565.92 is: 11,820.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640.64 : 21,582.96 = 8,565.92 : x
  2. Step 2: Convert to fraction form
    15,640.64/21,582.96 = 8,565.92/x
  3. Step 3: Cross multiply
    15,640.64x = 21,582.96 × 8,565.92
  4. Step 4: Simplify right side
    15,640.64x = 184,877,908.72
  5. Step 5: Solve for x
    x = 184,877,908.72/15,640.64
  6. Step 6: Final answer
    x = 11,820.35

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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.