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Finding the Fourth Proportional to 19,364.80, 29,111.20 and 16,830.40

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Solution

The fourth proportional to 19,364.80, 29,111.20 and 16,830.40 is: 25,301.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,364.80 : 29,111.20 = 16,830.40 : x
  2. Step 2: Convert to fraction form
    19,364.80/29,111.20 = 16,830.40/x
  3. Step 3: Cross multiply
    19,364.80x = 29,111.20 × 16,830.40
  4. Step 4: Simplify right side
    19,364.80x = 489,953,140.48
  5. Step 5: Solve for x
    x = 489,953,140.48/19,364.80
  6. Step 6: Final answer
    x = 25,301.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.