Home / 10,145.79-15,220.40-3,125.65

Finding the Fourth Proportional to 10,145.79, 15,220.40 and 3,125.65

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Solution

The fourth proportional to 10,145.79, 15,220.40 and 3,125.65 is: 4,689.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,145.79 : 15,220.40 = 3,125.65 : x
  2. Step 2: Convert to fraction form
    10,145.79/15,220.40 = 3,125.65/x
  3. Step 3: Cross multiply
    10,145.79x = 15,220.40 × 3,125.65
  4. Step 4: Simplify right side
    10,145.79x = 47,573,627.63
  5. Step 5: Solve for x
    x = 47,573,627.63/10,145.79
  6. Step 6: Final answer
    x = 4,689.00

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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.