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Finding the Fourth Proportional to 15,790.32, 21,800.88 and 9,824.40

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Solution

The fourth proportional to 15,790.32, 21,800.88 and 9,824.40 is: 13,564.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.32 : 21,800.88 = 9,824.40 : x
  2. Step 2: Convert to fraction form
    15,790.32/21,800.88 = 9,824.40/x
  3. Step 3: Cross multiply
    15,790.32x = 21,800.88 × 9,824.40
  4. Step 4: Simplify right side
    15,790.32x = 214,180,565.47
  5. Step 5: Solve for x
    x = 214,180,565.47/15,790.32
  6. Step 6: Final answer
    x = 13,564.04

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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.