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Finding the Fourth Proportional to 15,810.08, 21,810.04 and 9,432.20

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Solution

The fourth proportional to 15,810.08, 21,810.04 and 9,432.20 is: 13,011.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.08 : 21,810.04 = 9,432.20 : x
  2. Step 2: Convert to fraction form
    15,810.08/21,810.04 = 9,432.20/x
  3. Step 3: Cross multiply
    15,810.08x = 21,810.04 × 9,432.20
  4. Step 4: Simplify right side
    15,810.08x = 205,716,659.29
  5. Step 5: Solve for x
    x = 205,716,659.29/15,810.08
  6. Step 6: Final answer
    x = 13,011.74

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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.