Home / 13,780.92-19,013.36-7,810.40

Finding the Fourth Proportional to 13,780.92, 19,013.36 and 7,810.40

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Solution

The fourth proportional to 13,780.92, 19,013.36 and 7,810.40 is: 10,775.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.92 : 19,013.36 = 7,810.40 : x
  2. Step 2: Convert to fraction form
    13,780.92/19,013.36 = 7,810.40/x
  3. Step 3: Cross multiply
    13,780.92x = 19,013.36 × 7,810.40
  4. Step 4: Simplify right side
    13,780.92x = 148,501,946.94
  5. Step 5: Solve for x
    x = 148,501,946.94/13,780.92
  6. Step 6: Final answer
    x = 10,775.91

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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.