Home / 28,430.90-39,235.10-15,683.85

Finding the Fourth Proportional to 28,430.90, 39,235.10 and 15,683.85

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Solution

The fourth proportional to 28,430.90, 39,235.10 and 15,683.85 is: 21,643.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.90 : 39,235.10 = 15,683.85 : x
  2. Step 2: Convert to fraction form
    28,430.90/39,235.10 = 15,683.85/x
  3. Step 3: Cross multiply
    28,430.90x = 39,235.10 × 15,683.85
  4. Step 4: Simplify right side
    28,430.90x = 615,357,344.72
  5. Step 5: Solve for x
    x = 615,357,344.72/28,430.90
  6. Step 6: Final answer
    x = 21,643.97

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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.