Home / 28,435.44-39,240.66-15,688.74

Finding the Fourth Proportional to 28,435.44, 39,240.66 and 15,688.74

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Solution

The fourth proportional to 28,435.44, 39,240.66 and 15,688.74 is: 21,650.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,435.44 : 39,240.66 = 15,688.74 : x
  2. Step 2: Convert to fraction form
    28,435.44/39,240.66 = 15,688.74/x
  3. Step 3: Cross multiply
    28,435.44x = 39,240.66 × 15,688.74
  4. Step 4: Simplify right side
    28,435.44x = 615,636,409.18
  5. Step 5: Solve for x
    x = 615,636,409.18/28,435.44
  6. Step 6: Final answer
    x = 21,650.32

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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.