Home / 21,852.09-30,159.32-13,359.11

Finding the Fourth Proportional to 21,852.09, 30,159.32 and 13,359.11

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Solution

The fourth proportional to 21,852.09, 30,159.32 and 13,359.11 is: 18,437.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.09 : 30,159.32 = 13,359.11 : x
  2. Step 2: Convert to fraction form
    21,852.09/30,159.32 = 13,359.11/x
  3. Step 3: Cross multiply
    21,852.09x = 30,159.32 × 13,359.11
  4. Step 4: Simplify right side
    21,852.09x = 402,901,455.81
  5. Step 5: Solve for x
    x = 402,901,455.81/21,852.09
  6. Step 6: Final answer
    x = 18,437.66

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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.