Home / 42,715.58-64,079.49-13,135.91

Finding the Fourth Proportional to 42,715.58, 64,079.49 and 13,135.91

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Solution

The fourth proportional to 42,715.58, 64,079.49 and 13,135.91 is: 19,705.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,715.58 : 64,079.49 = 13,135.91 : x
  2. Step 2: Convert to fraction form
    42,715.58/64,079.49 = 13,135.91/x
  3. Step 3: Cross multiply
    42,715.58x = 64,079.49 × 13,135.91
  4. Step 4: Simplify right side
    42,715.58x = 841,742,093.09
  5. Step 5: Solve for x
    x = 841,742,093.09/42,715.58
  6. Step 6: Final answer
    x = 19,705.74

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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.