Home / 15,870.47-21,889.61-11,398.82

Finding the Fourth Proportional to 15,870.47, 21,889.61 and 11,398.82

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Solution

The fourth proportional to 15,870.47, 21,889.61 and 11,398.82 is: 15,722.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.47 : 21,889.61 = 11,398.82 : x
  2. Step 2: Convert to fraction form
    15,870.47/21,889.61 = 11,398.82/x
  3. Step 3: Cross multiply
    15,870.47x = 21,889.61 × 11,398.82
  4. Step 4: Simplify right side
    15,870.47x = 249,515,724.26
  5. Step 5: Solve for x
    x = 249,515,724.26/15,870.47
  6. Step 6: Final answer
    x = 15,722.01

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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.