Home / 42,965.34-64,386.54-18,920.76

Finding the Fourth Proportional to 42,965.34, 64,386.54 and 18,920.76

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Solution

The fourth proportional to 42,965.34, 64,386.54 and 18,920.76 is: 28,354.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,965.34 : 64,386.54 = 18,920.76 : x
  2. Step 2: Convert to fraction form
    42,965.34/64,386.54 = 18,920.76/x
  3. Step 3: Cross multiply
    42,965.34x = 64,386.54 × 18,920.76
  4. Step 4: Simplify right side
    42,965.34x = 1,218,242,270.57
  5. Step 5: Solve for x
    x = 1,218,242,270.57/42,965.34
  6. Step 6: Final answer
    x = 28,354.07

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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.