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Finding the Fourth Proportional to 28,669.40, 43,004.10 and 13,117.40

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Solution

The fourth proportional to 28,669.40, 43,004.10 and 13,117.40 is: 19,676.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,669.40 : 43,004.10 = 13,117.40 : x
  2. Step 2: Convert to fraction form
    28,669.40/43,004.10 = 13,117.40/x
  3. Step 3: Cross multiply
    28,669.40x = 43,004.10 × 13,117.40
  4. Step 4: Simplify right side
    28,669.40x = 564,101,981.34
  5. Step 5: Solve for x
    x = 564,101,981.34/28,669.40
  6. Step 6: Final answer
    x = 19,676.10

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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.