Home / 21,395.66-29,521-12,895.52

Finding the Fourth Proportional to 21,395.66, 29,521 and 12,895.52

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Solution

The fourth proportional to 21,395.66, 29,521 and 12,895.52 is: 17,792.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,395.66 : 29,521 = 12,895.52 : x
  2. Step 2: Convert to fraction form
    21,395.66/29,521 = 12,895.52/x
  3. Step 3: Cross multiply
    21,395.66x = 29,521 × 12,895.52
  4. Step 4: Simplify right side
    21,395.66x = 380,688,645.92
  5. Step 5: Solve for x
    x = 380,688,645.92/21,395.66
  6. Step 6: Final answer
    x = 17,792.80

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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.