Home / 42,679.19-64,031.60-20,207

Finding the Fourth Proportional to 42,679.19, 64,031.60 and 20,207

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Solution

The fourth proportional to 42,679.19, 64,031.60 and 20,207 is: 30,316.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,679.19 : 64,031.60 = 20,207 : x
  2. Step 2: Convert to fraction form
    42,679.19/64,031.60 = 20,207/x
  3. Step 3: Cross multiply
    42,679.19x = 64,031.60 × 20,207
  4. Step 4: Simplify right side
    42,679.19x = 1,293,886,541.20
  5. Step 5: Solve for x
    x = 1,293,886,541.20/42,679.19
  6. Step 6: Final answer
    x = 30,316.57

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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.