Home / 13,260.40-19,889.56-7,710.20

Finding the Fourth Proportional to 13,260.40, 19,889.56 and 7,710.20

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Solution

The fourth proportional to 13,260.40, 19,889.56 and 7,710.20 is: 11,564.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,260.40 : 19,889.56 = 7,710.20 : x
  2. Step 2: Convert to fraction form
    13,260.40/19,889.56 = 7,710.20/x
  3. Step 3: Cross multiply
    13,260.40x = 19,889.56 × 7,710.20
  4. Step 4: Simplify right side
    13,260.40x = 153,352,485.51
  5. Step 5: Solve for x
    x = 153,352,485.51/13,260.40
  6. Step 6: Final answer
    x = 11,564.70

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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.