Home / 21,051.81-31,560.95-12,157.04

Finding the Fourth Proportional to 21,051.81, 31,560.95 and 12,157.04

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Solution

The fourth proportional to 21,051.81, 31,560.95 and 12,157.04 is: 18,225.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.81 : 31,560.95 = 12,157.04 : x
  2. Step 2: Convert to fraction form
    21,051.81/31,560.95 = 12,157.04/x
  3. Step 3: Cross multiply
    21,051.81x = 31,560.95 × 12,157.04
  4. Step 4: Simplify right side
    21,051.81x = 383,687,749.71
  5. Step 5: Solve for x
    x = 383,687,749.71/21,051.81
  6. Step 6: Final answer
    x = 18,225.88

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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.