Home / 28,430.15-39,234.06-15,683.11

Finding the Fourth Proportional to 28,430.15, 39,234.06 and 15,683.11

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Solution

The fourth proportional to 28,430.15, 39,234.06 and 15,683.11 is: 21,642.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.15 : 39,234.06 = 15,683.11 : x
  2. Step 2: Convert to fraction form
    28,430.15/39,234.06 = 15,683.11/x
  3. Step 3: Cross multiply
    28,430.15x = 39,234.06 × 15,683.11
  4. Step 4: Simplify right side
    28,430.15x = 615,311,980.64
  5. Step 5: Solve for x
    x = 615,311,980.64/28,430.15
  6. Step 6: Final answer
    x = 21,642.94

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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.