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Finding the Fourth Proportional to 19,421.98, 26,803.74 and 11,869.74

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Solution

The fourth proportional to 19,421.98, 26,803.74 and 11,869.74 is: 16,381.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,421.98 : 26,803.74 = 11,869.74 : x
  2. Step 2: Convert to fraction form
    19,421.98/26,803.74 = 11,869.74/x
  3. Step 3: Cross multiply
    19,421.98x = 26,803.74 × 11,869.74
  4. Step 4: Simplify right side
    19,421.98x = 318,153,424.83
  5. Step 5: Solve for x
    x = 318,153,424.83/19,421.98
  6. Step 6: Final answer
    x = 16,381.10

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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.