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Finding the Fourth Proportional to 15,867.48, 21,901.04 and 9,157.10

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Solution

The fourth proportional to 15,867.48, 21,901.04 and 9,157.10 is: 12,639.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,867.48 : 21,901.04 = 9,157.10 : x
  2. Step 2: Convert to fraction form
    15,867.48/21,901.04 = 9,157.10/x
  3. Step 3: Cross multiply
    15,867.48x = 21,901.04 × 9,157.10
  4. Step 4: Simplify right side
    15,867.48x = 200,549,858.09
  5. Step 5: Solve for x
    x = 200,549,858.09/15,867.48
  6. Step 6: Final answer
    x = 12,639.05

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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.