Home / 15,405.60-21,301.20-13,437.30

Finding the Fourth Proportional to 15,405.60, 21,301.20 and 13,437.30

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Solution

The fourth proportional to 15,405.60, 21,301.20 and 13,437.30 is: 18,579.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.60 : 21,301.20 = 13,437.30 : x
  2. Step 2: Convert to fraction form
    15,405.60/21,301.20 = 13,437.30/x
  3. Step 3: Cross multiply
    15,405.60x = 21,301.20 × 13,437.30
  4. Step 4: Simplify right side
    15,405.60x = 286,230,614.76
  5. Step 5: Solve for x
    x = 286,230,614.76/15,405.60
  6. Step 6: Final answer
    x = 18,579.65

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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.