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Finding the Fourth Proportional to 18,666.84, 28,004.16 and 9,899.40

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Solution

The fourth proportional to 18,666.84, 28,004.16 and 9,899.40 is: 14,851.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.84 : 28,004.16 = 9,899.40 : x
  2. Step 2: Convert to fraction form
    18,666.84/28,004.16 = 9,899.40/x
  3. Step 3: Cross multiply
    18,666.84x = 28,004.16 × 9,899.40
  4. Step 4: Simplify right side
    18,666.84x = 277,224,381.50
  5. Step 5: Solve for x
    x = 277,224,381.50/18,666.84
  6. Step 6: Final answer
    x = 14,851.17

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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.