Home / 21,271.58-29,354.29-13,318.19

Finding the Fourth Proportional to 21,271.58, 29,354.29 and 13,318.19

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Solution

The fourth proportional to 21,271.58, 29,354.29 and 13,318.19 is: 18,378.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.58 : 29,354.29 = 13,318.19 : x
  2. Step 2: Convert to fraction form
    21,271.58/29,354.29 = 13,318.19/x
  3. Step 3: Cross multiply
    21,271.58x = 29,354.29 × 13,318.19
  4. Step 4: Simplify right side
    21,271.58x = 390,945,831.47
  5. Step 5: Solve for x
    x = 390,945,831.47/21,271.58
  6. Step 6: Final answer
    x = 18,378.79

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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.