Home / 21,071.04-29,077.56-11,639.40

Finding the Fourth Proportional to 21,071.04, 29,077.56 and 11,639.40

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Solution

The fourth proportional to 21,071.04, 29,077.56 and 11,639.40 is: 16,062.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.04 : 29,077.56 = 11,639.40 : x
  2. Step 2: Convert to fraction form
    21,071.04/29,077.56 = 11,639.40/x
  3. Step 3: Cross multiply
    21,071.04x = 29,077.56 × 11,639.40
  4. Step 4: Simplify right side
    21,071.04x = 338,445,351.86
  5. Step 5: Solve for x
    x = 338,445,351.86/21,071.04
  6. Step 6: Final answer
    x = 16,062.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.