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Finding the Fourth Proportional to 13,612.66, 18,784.39 and 7,643.19

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Solution

The fourth proportional to 13,612.66, 18,784.39 and 7,643.19 is: 10,547.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.66 : 18,784.39 = 7,643.19 : x
  2. Step 2: Convert to fraction form
    13,612.66/18,784.39 = 7,643.19/x
  3. Step 3: Cross multiply
    13,612.66x = 18,784.39 × 7,643.19
  4. Step 4: Simplify right side
    13,612.66x = 143,572,661.80
  5. Step 5: Solve for x
    x = 143,572,661.80/13,612.66
  6. Step 6: Final answer
    x = 10,547.00

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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.