Home / 38,428.77-53,031.92-21,434.13

Finding the Fourth Proportional to 38,428.77, 53,031.92 and 21,434.13

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Solution

The fourth proportional to 38,428.77, 53,031.92 and 21,434.13 is: 29,579.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,428.77 : 53,031.92 = 21,434.13 : x
  2. Step 2: Convert to fraction form
    38,428.77/53,031.92 = 21,434.13/x
  3. Step 3: Cross multiply
    38,428.77x = 53,031.92 × 21,434.13
  4. Step 4: Simplify right side
    38,428.77x = 1,136,692,960.26
  5. Step 5: Solve for x
    x = 1,136,692,960.26/38,428.77
  6. Step 6: Final answer
    x = 29,579.22

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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.