Home / 13,878.02-20,854.70-7,307.30

Finding the Fourth Proportional to 13,878.02, 20,854.70 and 7,307.30

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Solution

The fourth proportional to 13,878.02, 20,854.70 and 7,307.30 is: 10,980.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.02 : 20,854.70 = 7,307.30 : x
  2. Step 2: Convert to fraction form
    13,878.02/20,854.70 = 7,307.30/x
  3. Step 3: Cross multiply
    13,878.02x = 20,854.70 × 7,307.30
  4. Step 4: Simplify right side
    13,878.02x = 152,391,549.31
  5. Step 5: Solve for x
    x = 152,391,549.31/13,878.02
  6. Step 6: Final answer
    x = 10,980.78

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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.