Home / 15,407.10-21,303.27-13,438.80

Finding the Fourth Proportional to 15,407.10, 21,303.27 and 13,438.80

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Solution

The fourth proportional to 15,407.10, 21,303.27 and 13,438.80 is: 18,581.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,407.10 : 21,303.27 = 13,438.80 : x
  2. Step 2: Convert to fraction form
    15,407.10/21,303.27 = 13,438.80/x
  3. Step 3: Cross multiply
    15,407.10x = 21,303.27 × 13,438.80
  4. Step 4: Simplify right side
    15,407.10x = 286,290,384.88
  5. Step 5: Solve for x
    x = 286,290,384.88/15,407.10
  6. Step 6: Final answer
    x = 18,581.72

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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.