Home / 21,328.74-29,428.65-12,943.62

Finding the Fourth Proportional to 21,328.74, 29,428.65 and 12,943.62

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Solution

The fourth proportional to 21,328.74, 29,428.65 and 12,943.62 is: 17,859.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.74 : 29,428.65 = 12,943.62 : x
  2. Step 2: Convert to fraction form
    21,328.74/29,428.65 = 12,943.62/x
  3. Step 3: Cross multiply
    21,328.74x = 29,428.65 × 12,943.62
  4. Step 4: Simplify right side
    21,328.74x = 380,913,262.71
  5. Step 5: Solve for x
    x = 380,913,262.71/21,328.74
  6. Step 6: Final answer
    x = 17,859.15

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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.