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Finding the Fourth Proportional to 15,530.92, 21,432.94 and 8,457.32

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Solution

The fourth proportional to 15,530.92, 21,432.94 and 8,457.32 is: 11,671.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.92 : 21,432.94 = 8,457.32 : x
  2. Step 2: Convert to fraction form
    15,530.92/21,432.94 = 8,457.32/x
  3. Step 3: Cross multiply
    15,530.92x = 21,432.94 × 8,457.32
  4. Step 4: Simplify right side
    15,530.92x = 181,265,232.12
  5. Step 5: Solve for x
    x = 181,265,232.12/15,530.92
  6. Step 6: Final answer
    x = 11,671.25

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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.