Home / 21,938.90-30,275.51-12,507.26

Finding the Fourth Proportional to 21,938.90, 30,275.51 and 12,507.26

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Solution

The fourth proportional to 21,938.90, 30,275.51 and 12,507.26 is: 17,259.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.90 : 30,275.51 = 12,507.26 : x
  2. Step 2: Convert to fraction form
    21,938.90/30,275.51 = 12,507.26/x
  3. Step 3: Cross multiply
    21,938.90x = 30,275.51 × 12,507.26
  4. Step 4: Simplify right side
    21,938.90x = 378,663,461.29
  5. Step 5: Solve for x
    x = 378,663,461.29/21,938.90
  6. Step 6: Final answer
    x = 17,259.91

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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.