Home / 28,555.78-42,809.05-13,775.08

Finding the Fourth Proportional to 28,555.78, 42,809.05 and 13,775.08

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Solution

The fourth proportional to 28,555.78, 42,809.05 and 13,775.08 is: 20,650.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.78 : 42,809.05 = 13,775.08 : x
  2. Step 2: Convert to fraction form
    28,555.78/42,809.05 = 13,775.08/x
  3. Step 3: Cross multiply
    28,555.78x = 42,809.05 × 13,775.08
  4. Step 4: Simplify right side
    28,555.78x = 589,698,088.47
  5. Step 5: Solve for x
    x = 589,698,088.47/28,555.78
  6. Step 6: Final answer
    x = 20,650.74

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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.