Home / 13,260.79-19,890.13-7,710.59

Finding the Fourth Proportional to 13,260.79, 19,890.13 and 7,710.59

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Solution

The fourth proportional to 13,260.79, 19,890.13 and 7,710.59 is: 11,565.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,260.79 : 19,890.13 = 7,710.59 : x
  2. Step 2: Convert to fraction form
    13,260.79/19,890.13 = 7,710.59/x
  3. Step 3: Cross multiply
    13,260.79x = 19,890.13 × 7,710.59
  4. Step 4: Simplify right side
    13,260.79x = 153,364,637.48
  5. Step 5: Solve for x
    x = 153,364,637.48/13,260.79
  6. Step 6: Final answer
    x = 11,565.27

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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.