Home / 21,215.76-31,829.04-14,987.94

Finding the Fourth Proportional to 21,215.76, 31,829.04 and 14,987.94

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Solution

The fourth proportional to 21,215.76, 31,829.04 and 14,987.94 is: 22,485.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.76 : 31,829.04 = 14,987.94 : x
  2. Step 2: Convert to fraction form
    21,215.76/31,829.04 = 14,987.94/x
  3. Step 3: Cross multiply
    21,215.76x = 31,829.04 × 14,987.94
  4. Step 4: Simplify right side
    21,215.76x = 477,051,741.78
  5. Step 5: Solve for x
    x = 477,051,741.78/21,215.76
  6. Step 6: Final answer
    x = 22,485.72

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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.