Home / 13,130.02-18,119.60-7,827.90

Finding the Fourth Proportional to 13,130.02, 18,119.60 and 7,827.90

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Solution

The fourth proportional to 13,130.02, 18,119.60 and 7,827.90 is: 10,802.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.02 : 18,119.60 = 7,827.90 : x
  2. Step 2: Convert to fraction form
    13,130.02/18,119.60 = 7,827.90/x
  3. Step 3: Cross multiply
    13,130.02x = 18,119.60 × 7,827.90
  4. Step 4: Simplify right side
    13,130.02x = 141,838,416.84
  5. Step 5: Solve for x
    x = 141,838,416.84/13,130.02
  6. Step 6: Final answer
    x = 10,802.60

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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.