Home / 13,130.02-18,122.70-7,823.81

Finding the Fourth Proportional to 13,130.02, 18,122.70 and 7,823.81

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Solution

The fourth proportional to 13,130.02, 18,122.70 and 7,823.81 is: 10,798.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.02 : 18,122.70 = 7,823.81 : x
  2. Step 2: Convert to fraction form
    13,130.02/18,122.70 = 7,823.81/x
  3. Step 3: Cross multiply
    13,130.02x = 18,122.70 × 7,823.81
  4. Step 4: Simplify right side
    13,130.02x = 141,788,636.13
  5. Step 5: Solve for x
    x = 141,788,636.13/13,130.02
  6. Step 6: Final answer
    x = 10,798.81

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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.