Home / 42,688.20-64,031.70-19,314.60

Finding the Fourth Proportional to 42,688.20, 64,031.70 and 19,314.60

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Solution

The fourth proportional to 42,688.20, 64,031.70 and 19,314.60 is: 28,971.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,688.20 : 64,031.70 = 19,314.60 : x
  2. Step 2: Convert to fraction form
    42,688.20/64,031.70 = 19,314.60/x
  3. Step 3: Cross multiply
    42,688.20x = 64,031.70 × 19,314.60
  4. Step 4: Simplify right side
    42,688.20x = 1,236,746,672.82
  5. Step 5: Solve for x
    x = 1,236,746,672.82/42,688.20
  6. Step 6: Final answer
    x = 28,971.63

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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.