Home / 21,030.81-29,007.63-13,479.28

Finding the Fourth Proportional to 21,030.81, 29,007.63 and 13,479.28

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Solution

The fourth proportional to 21,030.81, 29,007.63 and 13,479.28 is: 18,591.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.81 : 29,007.63 = 13,479.28 : x
  2. Step 2: Convert to fraction form
    21,030.81/29,007.63 = 13,479.28/x
  3. Step 3: Cross multiply
    21,030.81x = 29,007.63 × 13,479.28
  4. Step 4: Simplify right side
    21,030.81x = 391,001,894.39
  5. Step 5: Solve for x
    x = 391,001,894.39/21,030.81
  6. Step 6: Final answer
    x = 18,591.86

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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.