Home / 38,688.40-58,020.24-12,386.88

Finding the Fourth Proportional to 38,688.40, 58,020.24 and 12,386.88

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Solution

The fourth proportional to 38,688.40, 58,020.24 and 12,386.88 is: 18,576.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,688.40 : 58,020.24 = 12,386.88 : x
  2. Step 2: Convert to fraction form
    38,688.40/58,020.24 = 12,386.88/x
  3. Step 3: Cross multiply
    38,688.40x = 58,020.24 × 12,386.88
  4. Step 4: Simplify right side
    38,688.40x = 718,689,750.45
  5. Step 5: Solve for x
    x = 718,689,750.45/38,688.40
  6. Step 6: Final answer
    x = 18,576.36

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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.