Home / 15,476.65-21,309.21-13,657.80

Finding the Fourth Proportional to 15,476.65, 21,309.21 and 13,657.80

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Solution

The fourth proportional to 15,476.65, 21,309.21 and 13,657.80 is: 18,804.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,476.65 : 21,309.21 = 13,657.80 : x
  2. Step 2: Convert to fraction form
    15,476.65/21,309.21 = 13,657.80/x
  3. Step 3: Cross multiply
    15,476.65x = 21,309.21 × 13,657.80
  4. Step 4: Simplify right side
    15,476.65x = 291,036,928.34
  5. Step 5: Solve for x
    x = 291,036,928.34/15,476.65
  6. Step 6: Final answer
    x = 18,804.90

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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.