Home / 15,145.16-20,897.87-8,430.62

Finding the Fourth Proportional to 15,145.16, 20,897.87 and 8,430.62

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Solution

The fourth proportional to 15,145.16, 20,897.87 and 8,430.62 is: 11,632.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.16 : 20,897.87 = 8,430.62 : x
  2. Step 2: Convert to fraction form
    15,145.16/20,897.87 = 8,430.62/x
  3. Step 3: Cross multiply
    15,145.16x = 20,897.87 × 8,430.62
  4. Step 4: Simplify right side
    15,145.16x = 176,181,854.14
  5. Step 5: Solve for x
    x = 176,181,854.14/15,145.16
  6. Step 6: Final answer
    x = 11,632.89

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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.