Home / 42,858.16-64,328.79-20,687.11

Finding the Fourth Proportional to 42,858.16, 64,328.79 and 20,687.11

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Solution

The fourth proportional to 42,858.16, 64,328.79 and 20,687.11 is: 31,050.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,858.16 : 64,328.79 = 20,687.11 : x
  2. Step 2: Convert to fraction form
    42,858.16/64,328.79 = 20,687.11/x
  3. Step 3: Cross multiply
    42,858.16x = 64,328.79 × 20,687.11
  4. Step 4: Simplify right side
    42,858.16x = 1,330,776,754.90
  5. Step 5: Solve for x
    x = 1,330,776,754.90/42,858.16
  6. Step 6: Final answer
    x = 31,050.72

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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.