Home / 13,280.04-18,328.02-7,977.78

Finding the Fourth Proportional to 13,280.04, 18,328.02 and 7,977.78

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Solution

The fourth proportional to 13,280.04, 18,328.02 and 7,977.78 is: 11,010.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.04 : 18,328.02 = 7,977.78 : x
  2. Step 2: Convert to fraction form
    13,280.04/18,328.02 = 7,977.78/x
  3. Step 3: Cross multiply
    13,280.04x = 18,328.02 × 7,977.78
  4. Step 4: Simplify right side
    13,280.04x = 146,216,911.40
  5. Step 5: Solve for x
    x = 146,216,911.40/13,280.04
  6. Step 6: Final answer
    x = 11,010.28

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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.