Home / 15,055.35-20,779.84-10,019.78

Finding the Fourth Proportional to 15,055.35, 20,779.84 and 10,019.78

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Solution

The fourth proportional to 15,055.35, 20,779.84 and 10,019.78 is: 13,829.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.35 : 20,779.84 = 10,019.78 : x
  2. Step 2: Convert to fraction form
    15,055.35/20,779.84 = 10,019.78/x
  3. Step 3: Cross multiply
    15,055.35x = 20,779.84 × 10,019.78
  4. Step 4: Simplify right side
    15,055.35x = 208,209,425.24
  5. Step 5: Solve for x
    x = 208,209,425.24/15,055.35
  6. Step 6: Final answer
    x = 13,829.60

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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.