Home / 13,746.52-18,970.20-7,778.07

Finding the Fourth Proportional to 13,746.52, 18,970.20 and 7,778.07

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Solution

The fourth proportional to 13,746.52, 18,970.20 and 7,778.07 is: 10,733.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,746.52 : 18,970.20 = 7,778.07 : x
  2. Step 2: Convert to fraction form
    13,746.52/18,970.20 = 7,778.07/x
  3. Step 3: Cross multiply
    13,746.52x = 18,970.20 × 7,778.07
  4. Step 4: Simplify right side
    13,746.52x = 147,551,543.51
  5. Step 5: Solve for x
    x = 147,551,543.51/13,746.52
  6. Step 6: Final answer
    x = 10,733.74

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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.