Home / 42,880.31-64,342.40-20,416.38

Finding the Fourth Proportional to 42,880.31, 64,342.40 and 20,416.38

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Solution

The fourth proportional to 42,880.31, 64,342.40 and 20,416.38 is: 30,635.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,880.31 : 64,342.40 = 20,416.38 : x
  2. Step 2: Convert to fraction form
    42,880.31/64,342.40 = 20,416.38/x
  3. Step 3: Cross multiply
    42,880.31x = 64,342.40 × 20,416.38
  4. Step 4: Simplify right side
    42,880.31x = 1,313,638,786.43
  5. Step 5: Solve for x
    x = 1,313,638,786.43/42,880.31
  6. Step 6: Final answer
    x = 30,635.01

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1.5x scale

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.