Home / 21,278.90-29,364.88-12,328.13

Finding the Fourth Proportional to 21,278.90, 29,364.88 and 12,328.13

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Solution

The fourth proportional to 21,278.90, 29,364.88 and 12,328.13 is: 17,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.90 : 29,364.88 = 12,328.13 : x
  2. Step 2: Convert to fraction form
    21,278.90/29,364.88 = 12,328.13/x
  3. Step 3: Cross multiply
    21,278.90x = 29,364.88 × 12,328.13
  4. Step 4: Simplify right side
    21,278.90x = 362,014,058.07
  5. Step 5: Solve for x
    x = 362,014,058.07/21,278.90
  6. Step 6: Final answer
    x = 17,012.82

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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.