Home / 15,530.72-21,432.12-8,457.02

Finding the Fourth Proportional to 15,530.72, 21,432.12 and 8,457.02

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Solution

The fourth proportional to 15,530.72, 21,432.12 and 8,457.02 is: 11,670.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.72 : 21,432.12 = 8,457.02 : x
  2. Step 2: Convert to fraction form
    15,530.72/21,432.12 = 8,457.02/x
  3. Step 3: Cross multiply
    15,530.72x = 21,432.12 × 8,457.02
  4. Step 4: Simplify right side
    15,530.72x = 181,251,867.48
  5. Step 5: Solve for x
    x = 181,251,867.48/15,530.72
  6. Step 6: Final answer
    x = 11,670.54

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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.