Home / 15,785.80-23,678.70-13,280.20

Finding the Fourth Proportional to 15,785.80, 23,678.70 and 13,280.20

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Solution

The fourth proportional to 15,785.80, 23,678.70 and 13,280.20 is: 19,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.80 : 23,678.70 = 13,280.20 : x
  2. Step 2: Convert to fraction form
    15,785.80/23,678.70 = 13,280.20/x
  3. Step 3: Cross multiply
    15,785.80x = 23,678.70 × 13,280.20
  4. Step 4: Simplify right side
    15,785.80x = 314,457,871.74
  5. Step 5: Solve for x
    x = 314,457,871.74/15,785.80
  6. Step 6: Final answer
    x = 19,920.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.