Home / 21,031.81-29,009.01-13,480.28

Finding the Fourth Proportional to 21,031.81, 29,009.01 and 13,480.28

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Solution

The fourth proportional to 21,031.81, 29,009.01 and 13,480.28 is: 18,593.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.81 : 29,009.01 = 13,480.28 : x
  2. Step 2: Convert to fraction form
    21,031.81/29,009.01 = 13,480.28/x
  3. Step 3: Cross multiply
    21,031.81x = 29,009.01 × 13,480.28
  4. Step 4: Simplify right side
    21,031.81x = 391,049,577.32
  5. Step 5: Solve for x
    x = 391,049,577.32/21,031.81
  6. Step 6: Final answer
    x = 18,593.24

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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.