Home / 28,239.90-42,401.70-15,784.80

Finding the Fourth Proportional to 28,239.90, 42,401.70 and 15,784.80

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Solution

The fourth proportional to 28,239.90, 42,401.70 and 15,784.80 is: 23,700.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.90 : 42,401.70 = 15,784.80 : x
  2. Step 2: Convert to fraction form
    28,239.90/42,401.70 = 15,784.80/x
  3. Step 3: Cross multiply
    28,239.90x = 42,401.70 × 15,784.80
  4. Step 4: Simplify right side
    28,239.90x = 669,302,354.16
  5. Step 5: Solve for x
    x = 669,302,354.16/28,239.90
  6. Step 6: Final answer
    x = 23,700.59

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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.