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Finding the Fourth Proportional to 15,856.16, 21,881.76 and 9,484.16

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Solution

The fourth proportional to 15,856.16, 21,881.76 and 9,484.16 is: 13,088.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.16 : 21,881.76 = 9,484.16 : x
  2. Step 2: Convert to fraction form
    15,856.16/21,881.76 = 9,484.16/x
  3. Step 3: Cross multiply
    15,856.16x = 21,881.76 × 9,484.16
  4. Step 4: Simplify right side
    15,856.16x = 207,530,112.92
  5. Step 5: Solve for x
    x = 207,530,112.92/15,856.16
  6. Step 6: Final answer
    x = 13,088.30

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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.