Finding the Fourth Proportional to 38,420,686.62, 53,020,968.21 and 21,017,032.02
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Solution
The fourth proportional to 38,420,686.62, 53,020,968.21 and 21,017,032.02 is: 29,003,734.31
Step by Step Solution
- Step 1: Write the proportion equation
38,420,686.62 : 53,020,968.21 = 21,017,032.02 : x - Step 2: Convert to fraction form
38,420,686.62/53,020,968.21 = 21,017,032.02/x - Step 3: Cross multiply
38,420,686.62x = 53,020,968.21 × 21,017,032.02 - Step 4: Simplify right side
38,420,686.62x = 1,114,343,386,600,972.12 - Step 5: Solve for x
x = 1,114,343,386,600,972.12/38,420,686.62 - Step 6: Final answer
x = 29,003,734.31
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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.