Home / 21,034.74-31,509.18-13,111.32

Finding the Fourth Proportional to 21,034.74, 31,509.18 and 13,111.32

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Solution

The fourth proportional to 21,034.74, 31,509.18 and 13,111.32 is: 19,640.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,034.74 : 31,509.18 = 13,111.32 : x
  2. Step 2: Convert to fraction form
    21,034.74/31,509.18 = 13,111.32/x
  3. Step 3: Cross multiply
    21,034.74x = 31,509.18 × 13,111.32
  4. Step 4: Simplify right side
    21,034.74x = 413,126,941.92
  5. Step 5: Solve for x
    x = 413,126,941.92/21,034.74
  6. Step 6: Final answer
    x = 19,640.22

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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.