Home / 12,280.35-18,420.65-9,830.74

Finding the Fourth Proportional to 12,280.35, 18,420.65 and 9,830.74

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Solution

The fourth proportional to 12,280.35, 18,420.65 and 9,830.74 is: 14,746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.35 : 18,420.65 = 9,830.74 : x
  2. Step 2: Convert to fraction form
    12,280.35/18,420.65 = 9,830.74/x
  3. Step 3: Cross multiply
    12,280.35x = 18,420.65 × 9,830.74
  4. Step 4: Simplify right side
    12,280.35x = 181,088,571.63
  5. Step 5: Solve for x
    x = 181,088,571.63/12,280.35
  6. Step 6: Final answer
    x = 14,746.21

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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.