Home / 28,957.32-39,986.04-18,220.10

Finding the Fourth Proportional to 28,957.32, 39,986.04 and 18,220.10

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Solution

The fourth proportional to 28,957.32, 39,986.04 and 18,220.10 is: 25,159.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,957.32 : 39,986.04 = 18,220.10 : x
  2. Step 2: Convert to fraction form
    28,957.32/39,986.04 = 18,220.10/x
  3. Step 3: Cross multiply
    28,957.32x = 39,986.04 × 18,220.10
  4. Step 4: Simplify right side
    28,957.32x = 728,549,647.40
  5. Step 5: Solve for x
    x = 728,549,647.40/28,957.32
  6. Step 6: Final answer
    x = 25,159.43

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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.