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Finding the Fourth Proportional to 20,745.60, 31,053.60 and 16,339.20

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Solution

The fourth proportional to 20,745.60, 31,053.60 and 16,339.20 is: 24,457.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.60 : 31,053.60 = 16,339.20 : x
  2. Step 2: Convert to fraction form
    20,745.60/31,053.60 = 16,339.20/x
  3. Step 3: Cross multiply
    20,745.60x = 31,053.60 × 16,339.20
  4. Step 4: Simplify right side
    20,745.60x = 507,390,981.12
  5. Step 5: Solve for x
    x = 507,390,981.12/20,745.60
  6. Step 6: Final answer
    x = 24,457.76

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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.