Home / 13,678.48-18,876.78-7,710.40

Finding the Fourth Proportional to 13,678.48, 18,876.78 and 7,710.40

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Solution

The fourth proportional to 13,678.48, 18,876.78 and 7,710.40 is: 10,640.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.48 : 18,876.78 = 7,710.40 : x
  2. Step 2: Convert to fraction form
    13,678.48/18,876.78 = 7,710.40/x
  3. Step 3: Cross multiply
    13,678.48x = 18,876.78 × 7,710.40
  4. Step 4: Simplify right side
    13,678.48x = 145,547,524.51
  5. Step 5: Solve for x
    x = 145,547,524.51/13,678.48
  6. Step 6: Final answer
    x = 10,640.62

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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.