Home / 42,720.87-64,079.37-14,643.42

Finding the Fourth Proportional to 42,720.87, 64,079.37 and 14,643.42

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Solution

The fourth proportional to 42,720.87, 64,079.37 and 14,643.42 is: 21,964.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,720.87 : 64,079.37 = 14,643.42 : x
  2. Step 2: Convert to fraction form
    42,720.87/64,079.37 = 14,643.42/x
  3. Step 3: Cross multiply
    42,720.87x = 64,079.37 × 14,643.42
  4. Step 4: Simplify right side
    42,720.87x = 938,341,128.25
  5. Step 5: Solve for x
    x = 938,341,128.25/42,720.87
  6. Step 6: Final answer
    x = 21,964.47

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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.