Home / 13,678.51-18,877.38-7,710.74

Finding the Fourth Proportional to 13,678.51, 18,877.38 and 7,710.74

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Solution

The fourth proportional to 13,678.51, 18,877.38 and 7,710.74 is: 10,641.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.51 : 18,877.38 = 7,710.74 : x
  2. Step 2: Convert to fraction form
    13,678.51/18,877.38 = 7,710.74/x
  3. Step 3: Cross multiply
    13,678.51x = 18,877.38 × 7,710.74
  4. Step 4: Simplify right side
    13,678.51x = 145,558,569.06
  5. Step 5: Solve for x
    x = 145,558,569.06/13,678.51
  6. Step 6: Final answer
    x = 10,641.41

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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.