Home / 42,989.69-64,490.99-13,409.84

Finding the Fourth Proportional to 42,989.69, 64,490.99 and 13,409.84

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Solution

The fourth proportional to 42,989.69, 64,490.99 and 13,409.84 is: 20,116.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,989.69 : 64,490.99 = 13,409.84 : x
  2. Step 2: Convert to fraction form
    42,989.69/64,490.99 = 13,409.84/x
  3. Step 3: Cross multiply
    42,989.69x = 64,490.99 × 13,409.84
  4. Step 4: Simplify right side
    42,989.69x = 864,813,857.34
  5. Step 5: Solve for x
    x = 864,813,857.34/42,989.69
  6. Step 6: Final answer
    x = 20,116.77

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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.