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Finding the Fourth Proportional to 14,038.72, 21,009.17 and 8,699.40

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Solution

The fourth proportional to 14,038.72, 21,009.17 and 8,699.40 is: 13,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,038.72 : 21,009.17 = 8,699.40 : x
  2. Step 2: Convert to fraction form
    14,038.72/21,009.17 = 8,699.40/x
  3. Step 3: Cross multiply
    14,038.72x = 21,009.17 × 8,699.40
  4. Step 4: Simplify right side
    14,038.72x = 182,767,195.25
  5. Step 5: Solve for x
    x = 182,767,195.25/14,038.72
  6. Step 6: Final answer
    x = 13,018.80

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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.