Home / 28,200.86-42,301.38-7,140.89

Finding the Fourth Proportional to 28,200.86, 42,301.38 and 7,140.89

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Solution

The fourth proportional to 28,200.86, 42,301.38 and 7,140.89 is: 10,711.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.86 : 42,301.38 = 7,140.89 : x
  2. Step 2: Convert to fraction form
    28,200.86/42,301.38 = 7,140.89/x
  3. Step 3: Cross multiply
    28,200.86x = 42,301.38 × 7,140.89
  4. Step 4: Simplify right side
    28,200.86x = 302,069,389.07
  5. Step 5: Solve for x
    x = 302,069,389.07/28,200.86
  6. Step 6: Final answer
    x = 10,711.36

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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.