Home / 21,440.87-29,602.84-13,386.79

Finding the Fourth Proportional to 21,440.87, 29,602.84 and 13,386.79

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Solution

The fourth proportional to 21,440.87, 29,602.84 and 13,386.79 is: 18,482.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,440.87 : 29,602.84 = 13,386.79 : x
  2. Step 2: Convert to fraction form
    21,440.87/29,602.84 = 13,386.79/x
  3. Step 3: Cross multiply
    21,440.87x = 29,602.84 × 13,386.79
  4. Step 4: Simplify right side
    21,440.87x = 396,286,985.51
  5. Step 5: Solve for x
    x = 396,286,985.51/21,440.87
  6. Step 6: Final answer
    x = 18,482.78

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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.