Home / 15,145.65-20,900.57-8,430.89

Finding the Fourth Proportional to 15,145.65, 20,900.57 and 8,430.89

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Solution

The fourth proportional to 15,145.65, 20,900.57 and 8,430.89 is: 11,634.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.65 : 20,900.57 = 8,430.89 : x
  2. Step 2: Convert to fraction form
    15,145.65/20,900.57 = 8,430.89/x
  3. Step 3: Cross multiply
    15,145.65x = 20,900.57 × 8,430.89
  4. Step 4: Simplify right side
    15,145.65x = 176,210,259.95
  5. Step 5: Solve for x
    x = 176,210,259.95/15,145.65
  6. Step 6: Final answer
    x = 11,634.38

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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.