Home / 28,379.40-39,160.60-16,440.50

Finding the Fourth Proportional to 28,379.40, 39,160.60 and 16,440.50

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Solution

The fourth proportional to 28,379.40, 39,160.60 and 16,440.50 is: 22,686.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.40 : 39,160.60 = 16,440.50 : x
  2. Step 2: Convert to fraction form
    28,379.40/39,160.60 = 16,440.50/x
  3. Step 3: Cross multiply
    28,379.40x = 39,160.60 × 16,440.50
  4. Step 4: Simplify right side
    28,379.40x = 643,819,901.10
  5. Step 5: Solve for x
    x = 643,819,901.10/28,379.40
  6. Step 6: Final answer
    x = 22,686.17

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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.