Home / 21,088.04-31,643.34-13,690.76

Finding the Fourth Proportional to 21,088.04, 31,643.34 and 13,690.76

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Solution

The fourth proportional to 21,088.04, 31,643.34 and 13,690.76 is: 20,543.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,088.04 : 31,643.34 = 13,690.76 : x
  2. Step 2: Convert to fraction form
    21,088.04/31,643.34 = 13,690.76/x
  3. Step 3: Cross multiply
    21,088.04x = 31,643.34 × 13,690.76
  4. Step 4: Simplify right side
    21,088.04x = 433,221,373.54
  5. Step 5: Solve for x
    x = 433,221,373.54/21,088.04
  6. Step 6: Final answer
    x = 20,543.46

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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.