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Finding the Fourth Proportional to 21,603.08, 32,403.54 and 8,457.86

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Solution

The fourth proportional to 21,603.08, 32,403.54 and 8,457.86 is: 12,686.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.08 : 32,403.54 = 8,457.86 : x
  2. Step 2: Convert to fraction form
    21,603.08/32,403.54 = 8,457.86/x
  3. Step 3: Cross multiply
    21,603.08x = 32,403.54 × 8,457.86
  4. Step 4: Simplify right side
    21,603.08x = 274,064,604.82
  5. Step 5: Solve for x
    x = 274,064,604.82/21,603.08
  6. Step 6: Final answer
    x = 12,686.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.