Home / 21,547.04-29,702.80-13,157.92

Finding the Fourth Proportional to 21,547.04, 29,702.80 and 13,157.92

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Solution

The fourth proportional to 21,547.04, 29,702.80 and 13,157.92 is: 18,138.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,547.04 : 29,702.80 = 13,157.92 : x
  2. Step 2: Convert to fraction form
    21,547.04/29,702.80 = 13,157.92/x
  3. Step 3: Cross multiply
    21,547.04x = 29,702.80 × 13,157.92
  4. Step 4: Simplify right side
    21,547.04x = 390,827,066.18
  5. Step 5: Solve for x
    x = 390,827,066.18/21,547.04
  6. Step 6: Final answer
    x = 18,138.32

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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.