Home / 28,125.10-42,187.65-14,128.30

Finding the Fourth Proportional to 28,125.10, 42,187.65 and 14,128.30

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Solution

The fourth proportional to 28,125.10, 42,187.65 and 14,128.30 is: 21,192.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.10 : 42,187.65 = 14,128.30 : x
  2. Step 2: Convert to fraction form
    28,125.10/42,187.65 = 14,128.30/x
  3. Step 3: Cross multiply
    28,125.10x = 42,187.65 × 14,128.30
  4. Step 4: Simplify right side
    28,125.10x = 596,039,775.50
  5. Step 5: Solve for x
    x = 596,039,775.50/28,125.10
  6. Step 6: Final answer
    x = 21,192.45

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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.