Home / 21,151.56-31,720.80-14,619.72

Finding the Fourth Proportional to 21,151.56, 31,720.80 and 14,619.72

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Solution

The fourth proportional to 21,151.56, 31,720.80 and 14,619.72 is: 21,925.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.56 : 31,720.80 = 14,619.72 : x
  2. Step 2: Convert to fraction form
    21,151.56/31,720.80 = 14,619.72/x
  3. Step 3: Cross multiply
    21,151.56x = 31,720.80 × 14,619.72
  4. Step 4: Simplify right side
    21,151.56x = 463,749,214.18
  5. Step 5: Solve for x
    x = 463,749,214.18/21,151.56
  6. Step 6: Final answer
    x = 21,925.06

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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.