Home / 42,910.40-64,281.81-20,389.03

Finding the Fourth Proportional to 42,910.40, 64,281.81 and 20,389.03

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Solution

The fourth proportional to 42,910.40, 64,281.81 and 20,389.03 is: 30,543.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,910.40 : 64,281.81 = 20,389.03 : x
  2. Step 2: Convert to fraction form
    42,910.40/64,281.81 = 20,389.03/x
  3. Step 3: Cross multiply
    42,910.40x = 64,281.81 × 20,389.03
  4. Step 4: Simplify right side
    42,910.40x = 1,310,643,329.19
  5. Step 5: Solve for x
    x = 1,310,643,329.19/42,910.40
  6. Step 6: Final answer
    x = 30,543.72

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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.