Home / 42,990.10-64,486.61-11,403.35

Finding the Fourth Proportional to 42,990.10, 64,486.61 and 11,403.35

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Solution

The fourth proportional to 42,990.10, 64,486.61 and 11,403.35 is: 17,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,990.10 : 64,486.61 = 11,403.35 : x
  2. Step 2: Convert to fraction form
    42,990.10/64,486.61 = 11,403.35/x
  3. Step 3: Cross multiply
    42,990.10x = 64,486.61 × 11,403.35
  4. Step 4: Simplify right side
    42,990.10x = 735,363,652.02
  5. Step 5: Solve for x
    x = 735,363,652.02/42,990.10
  6. Step 6: Final answer
    x = 17,105.42

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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.