Home / 28,530.90-42,733.71-18,500.40

Finding the Fourth Proportional to 28,530.90, 42,733.71 and 18,500.40

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Solution

The fourth proportional to 28,530.90, 42,733.71 and 18,500.40 is: 27,709.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.90 : 42,733.71 = 18,500.40 : x
  2. Step 2: Convert to fraction form
    28,530.90/42,733.71 = 18,500.40/x
  3. Step 3: Cross multiply
    28,530.90x = 42,733.71 × 18,500.40
  4. Step 4: Simplify right side
    28,530.90x = 790,590,728.48
  5. Step 5: Solve for x
    x = 790,590,728.48/28,530.90
  6. Step 6: Final answer
    x = 27,709.98

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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.