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Finding the Fourth Proportional to 19,291.55, 26,607.33 and 12,916.12

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Solution

The fourth proportional to 19,291.55, 26,607.33 and 12,916.12 is: 17,814.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,291.55 : 26,607.33 = 12,916.12 : x
  2. Step 2: Convert to fraction form
    19,291.55/26,607.33 = 12,916.12/x
  3. Step 3: Cross multiply
    19,291.55x = 26,607.33 × 12,916.12
  4. Step 4: Simplify right side
    19,291.55x = 343,663,400.64
  5. Step 5: Solve for x
    x = 343,663,400.64/19,291.55
  6. Step 6: Final answer
    x = 17,814.19

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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.