Home / 13,761.04-18,970.32-9,780.70

Finding the Fourth Proportional to 13,761.04, 18,970.32 and 9,780.70

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Solution

The fourth proportional to 13,761.04, 18,970.32 and 9,780.70 is: 13,483.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.04 : 18,970.32 = 9,780.70 : x
  2. Step 2: Convert to fraction form
    13,761.04/18,970.32 = 9,780.70/x
  3. Step 3: Cross multiply
    13,761.04x = 18,970.32 × 9,780.70
  4. Step 4: Simplify right side
    13,761.04x = 185,543,008.82
  5. Step 5: Solve for x
    x = 185,543,008.82/13,761.04
  6. Step 6: Final answer
    x = 13,483.21

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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.