Home / 15,030.09-20,741.40-8,315.60

Finding the Fourth Proportional to 15,030.09, 20,741.40 and 8,315.60

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Solution

The fourth proportional to 15,030.09, 20,741.40 and 8,315.60 is: 11,475.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.09 : 20,741.40 = 8,315.60 : x
  2. Step 2: Convert to fraction form
    15,030.09/20,741.40 = 8,315.60/x
  3. Step 3: Cross multiply
    15,030.09x = 20,741.40 × 8,315.60
  4. Step 4: Simplify right side
    15,030.09x = 172,477,082.13
  5. Step 5: Solve for x
    x = 172,477,082.13/15,030.09
  6. Step 6: Final answer
    x = 11,475.45

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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.