Home / 28,430.84-39,234.44-15,683.68

Finding the Fourth Proportional to 28,430.84, 39,234.44 and 15,683.68

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Solution

The fourth proportional to 28,430.84, 39,234.44 and 15,683.68 is: 21,643.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.84 : 39,234.44 = 15,683.68 : x
  2. Step 2: Convert to fraction form
    28,430.84/39,234.44 = 15,683.68/x
  3. Step 3: Cross multiply
    28,430.84x = 39,234.44 × 15,683.68
  4. Step 4: Simplify right side
    28,430.84x = 615,340,401.94
  5. Step 5: Solve for x
    x = 615,340,401.94/28,430.84
  6. Step 6: Final answer
    x = 21,643.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.