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Finding the Fourth Proportional to 15,856.84, 21,867.34 and 9,482.40

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Solution

The fourth proportional to 15,856.84, 21,867.34 and 9,482.40 is: 13,076.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.84 : 21,867.34 = 9,482.40 : x
  2. Step 2: Convert to fraction form
    15,856.84/21,867.34 = 9,482.40/x
  3. Step 3: Cross multiply
    15,856.84x = 21,867.34 × 9,482.40
  4. Step 4: Simplify right side
    15,856.84x = 207,354,864.82
  5. Step 5: Solve for x
    x = 207,354,864.82/15,856.84
  6. Step 6: Final answer
    x = 13,076.68

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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.