Home / 13,715.40-20,570.47-6,688.35

Finding the Fourth Proportional to 13,715.40, 20,570.47 and 6,688.35

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Solution

The fourth proportional to 13,715.40, 20,570.47 and 6,688.35 is: 10,031.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.40 : 20,570.47 = 6,688.35 : x
  2. Step 2: Convert to fraction form
    13,715.40/20,570.47 = 6,688.35/x
  3. Step 3: Cross multiply
    13,715.40x = 20,570.47 × 6,688.35
  4. Step 4: Simplify right side
    13,715.40x = 137,582,503.02
  5. Step 5: Solve for x
    x = 137,582,503.02/13,715.40
  6. Step 6: Final answer
    x = 10,031.24

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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.