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Finding the Fourth Proportional to 21,355.53, 29,484.50 and 19,113.52

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Solution

The fourth proportional to 21,355.53, 29,484.50 and 19,113.52 is: 26,389.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355.53 : 29,484.50 = 19,113.52 : x
  2. Step 2: Convert to fraction form
    21,355.53/29,484.50 = 19,113.52/x
  3. Step 3: Cross multiply
    21,355.53x = 29,484.50 × 19,113.52
  4. Step 4: Simplify right side
    21,355.53x = 563,552,580.44
  5. Step 5: Solve for x
    x = 563,552,580.44/21,355.53
  6. Step 6: Final answer
    x = 26,389.07

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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.