Home / 30,156.30-45,212.58-20,271.06

Finding the Fourth Proportional to 30,156.30, 45,212.58 and 20,271.06

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Solution

The fourth proportional to 30,156.30, 45,212.58 and 20,271.06 is: 30,391.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,156.30 : 45,212.58 = 20,271.06 : x
  2. Step 2: Convert to fraction form
    30,156.30/45,212.58 = 20,271.06/x
  3. Step 3: Cross multiply
    30,156.30x = 45,212.58 × 20,271.06
  4. Step 4: Simplify right side
    30,156.30x = 916,506,921.93
  5. Step 5: Solve for x
    x = 916,506,921.93/30,156.30
  6. Step 6: Final answer
    x = 30,391.89

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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.