Home / 21,428.39-29,569.57-12,347.30

Finding the Fourth Proportional to 21,428.39, 29,569.57 and 12,347.30

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Solution

The fourth proportional to 21,428.39, 29,569.57 and 12,347.30 is: 17,038.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.39 : 29,569.57 = 12,347.30 : x
  2. Step 2: Convert to fraction form
    21,428.39/29,569.57 = 12,347.30/x
  3. Step 3: Cross multiply
    21,428.39x = 29,569.57 × 12,347.30
  4. Step 4: Simplify right side
    21,428.39x = 365,104,283.83
  5. Step 5: Solve for x
    x = 365,104,283.83/21,428.39
  6. Step 6: Final answer
    x = 17,038.35

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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.