Home / 30,165.60-45,262.08-12,639.36

Finding the Fourth Proportional to 30,165.60, 45,262.08 and 12,639.36

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Solution

The fourth proportional to 30,165.60, 45,262.08 and 12,639.36 is: 18,964.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,165.60 : 45,262.08 = 12,639.36 : x
  2. Step 2: Convert to fraction form
    30,165.60/45,262.08 = 12,639.36/x
  3. Step 3: Cross multiply
    30,165.60x = 45,262.08 × 12,639.36
  4. Step 4: Simplify right side
    30,165.60x = 572,083,723.47
  5. Step 5: Solve for x
    x = 572,083,723.47/30,165.60
  6. Step 6: Final answer
    x = 18,964.77

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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.