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Finding the Fourth Proportional to 15,808.32, 21,826.08 and 9,842.40

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Solution

The fourth proportional to 15,808.32, 21,826.08 and 9,842.40 is: 13,589.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.32 : 21,826.08 = 9,842.40 : x
  2. Step 2: Convert to fraction form
    15,808.32/21,826.08 = 9,842.40/x
  3. Step 3: Cross multiply
    15,808.32x = 21,826.08 × 9,842.40
  4. Step 4: Simplify right side
    15,808.32x = 214,821,009.79
  5. Step 5: Solve for x
    x = 214,821,009.79/15,808.32
  6. Step 6: Final answer
    x = 13,589.11

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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.