Home / 28,088.60-42,133.78-12,285.50

Finding the Fourth Proportional to 28,088.60, 42,133.78 and 12,285.50

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Solution

The fourth proportional to 28,088.60, 42,133.78 and 12,285.50 is: 18,428.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,088.60 : 42,133.78 = 12,285.50 : x
  2. Step 2: Convert to fraction form
    28,088.60/42,133.78 = 12,285.50/x
  3. Step 3: Cross multiply
    28,088.60x = 42,133.78 × 12,285.50
  4. Step 4: Simplify right side
    28,088.60x = 517,634,554.19
  5. Step 5: Solve for x
    x = 517,634,554.19/28,088.60
  6. Step 6: Final answer
    x = 18,428.63

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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.