Home / 18,688.72-28,033.85-8,702.77

Finding the Fourth Proportional to 18,688.72, 28,033.85 and 8,702.77

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Solution

The fourth proportional to 18,688.72, 28,033.85 and 8,702.77 is: 13,054.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.72 : 28,033.85 = 8,702.77 : x
  2. Step 2: Convert to fraction form
    18,688.72/28,033.85 = 8,702.77/x
  3. Step 3: Cross multiply
    18,688.72x = 28,033.85 × 8,702.77
  4. Step 4: Simplify right side
    18,688.72x = 243,972,148.76
  5. Step 5: Solve for x
    x = 243,972,148.76/18,688.72
  6. Step 6: Final answer
    x = 13,054.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.