Home / 42,684.36-64,065.30-21,639.06

Finding the Fourth Proportional to 42,684.36, 64,065.30 and 21,639.06

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Solution

The fourth proportional to 42,684.36, 64,065.30 and 21,639.06 is: 32,478.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,684.36 : 64,065.30 = 21,639.06 : x
  2. Step 2: Convert to fraction form
    42,684.36/64,065.30 = 21,639.06/x
  3. Step 3: Cross multiply
    42,684.36x = 64,065.30 × 21,639.06
  4. Step 4: Simplify right side
    42,684.36x = 1,386,312,870.62
  5. Step 5: Solve for x
    x = 1,386,312,870.62/42,684.36
  6. Step 6: Final answer
    x = 32,478.24

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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.